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Hornady light magnum
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Has anyone chrony'd the hornady light mags and compaired them to a handloaded round of the same bullet. I was just wondering if the velocities listed by Hdy is accurate. I read somewhere that the velocity gains are only attainable in a longer barrel.


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Originally posted by BART185

I've had another member on this board post an aireal photograph of my neighborhood,post my wifes name,dig up old ads on GunsAmerica,call me out on everything that I posted. Hell,obmuteR told me to FIST MYSELF. But you are the biggest jackass that I've seen yet, on this board!
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-Ratboy
 
Posts: 194 | Location: Copperhead Road | Registered: 11 March 2005Reply With Quote
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I have chronographed a few hornady light mag loads and a couple of federal hi energy loads.The cartridges were 270win,308win and 30-06.None of the loads reached the advertised velocities with the closest being over 50fps short and that was with a 30-06 rifle with a 24" barrel.Some of the loads were over 100fps short of the advertised velocities.Accuracy ranged from mediocre to terrible compared to other loads in the same rifles.
 
Posts: 3104 | Location: alberta,canada | Registered: 28 January 2002Reply With Quote
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I will second stubblejumpers thoughts on the accuracy/consistency front. I haven't chronographed any, but I had poor results compared to other factory ammo, (I prefer Winchester) and certainly compared to my handloads in terms of accuracy, and consistency.
 
Posts: 3563 | Location: GA, USA | Registered: 02 August 2004Reply With Quote
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My Oehler said the 180 gr 300 win mag heavy magnum bullets came out the tube at 2880, only 220 fps less than advertised. This same rifle achieved 3150 fps with Sierra prohunters and a less than max load of RL22. The 7mm08 loads that I chronied were at 2935, slightly less than the box said, which was 3000 fps, also in an Abolt. Accuracy was fair at best and recoil was more noticeable. My take is that if you want 300 mag velocities, buy a 300 mag. If you want a 308, buy a 308.
 
Posts: 231 | Location: Abbotsford, Wis. | Registered: 31 December 2003Reply With Quote
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Chronographed 30-06 165 SST at 3015 fps from a 26" barreled 30-06 AI. I load 165 bullets to 3200 fps with the 30-06 AI in the same gun.
 
Posts: 3720 | Registered: 03 March 2005Reply With Quote
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quote:
Chronographed 30-06 165 SST at 3015 fps from a 26" barreled 30-06 AI. I load 165 bullets to 3200 fps with the 30-06 AI in the same gun.


Wholly cow! That is .300 win. mag. performance... Any pressure signs, cause that seems very hot? bewildered
 
Posts: 979 | Registered: 04 June 2004Reply With Quote
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I have experience with 3 Hornady Light Mag 308 loads. The 168 and 180 match loads shot good at 1000 [one thousand] yards in a factory Remington 700 "sniper" rifle. The rifle had a 1 in 12 twist, the 168 shot the best.

I killed some deer with the 165 SP out of my Remington Model 7 [18" bbl]. They worked very well.


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Posts: 16134 | Location: Texas | Registered: 06 April 2002Reply With Quote
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Hmm interesting...I have had great results...308 light mag 165 grns...2850 oyt of a 23 inch semi custom rem 700...1/2 inch groups


Mike

Legistine actu quod scripsi?

Never under estimate the internet community's ability to reply to your post with their personal rant about their tangentially related, single occurrence issue.




What I have learned on AR, since 2001:
1. The proper answer to: Where is the best place in town to get a steak dinner? is…You should go to Mel's Diner and get the fried chicken.
2. Big game animals can tell the difference between .015 of an inch in diameter, 15 grains of bullet weight, and 150 fps.
3. There is a difference in the performance of two identical projectiles launched at the same velocity if they came from different cartridges.
4. While a double rifle is the perfect DGR, every 375HH bolt gun needs to be modified to carry at least 5 down.
5. While a floor plate and detachable box magazine both use a mechanical latch, only the floor plate latch is reliable. Disregard the fact that every modern military rifle uses a detachable box magazine.
6. The Remington 700 is unreliable regardless of the fact it is the basis of the USMC M40 sniper rifle for 40+ years with no changes to the receiver or extractor and is the choice of more military and law enforcement sniper units than any other rifle.
7. PF actions are not suitable for a DGR and it is irrelevant that the M1, M14, M16, & AK47 which were designed for hunting men that can shoot back are all PF actions.
8. 95 deg F in Africa is different than 95 deg F in TX or CA and that is why you must worry about ammunition temperature in Africa (even though most safaris take place in winter) but not in TX or in CA.
9. The size of a ding in a gun's finish doesn't matter, what matters is whether it’s a safe ding or not.
10. 1 in a row is a trend, 2 in a row is statistically significant, and 3 in a row is an irrefutable fact.
11. Never buy a WSM or RCM cartridge for a safari rifle or your go to rifle in the USA because if they lose your ammo you can't find replacement ammo but don't worry 280 Rem, 338-06, 35 Whelen, and all Weatherby cartridges abound in Africa and back country stores.
12. A well hit animal can run 75 yds. in the open and suddenly drop with no initial blood trail, but the one I shot from 200 yds. away that ran 10 yds. and disappeared into a thicket and was not found was lost because the bullet penciled thru. I am 100% certain of this even though I have no physical evidence.
13. A 300 Win Mag is a 500 yard elk cartridge but a 308 Win is not a 300 yard elk cartridge even though the same bullet is travelling at the same velocity at those respective distances.
 
Posts: 10183 | Location: Loving retirement in Boise, ID | Registered: 16 December 2003Reply With Quote
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mousegun,

Hornady does NOT load the Nosler Partition in the Light Magnum offering, so it won't be able to kill anything anyway!


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CAUTION: The next poster likes men!!!!
 
Posts: 16 | Registered: 04 January 2005Reply With Quote
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Why is it that they don't offer a light mag load for the 7mmRemMag??
 
Posts: 6080 | Location: New York City "The Concrete Jungle" | Registered: 04 May 2003Reply With Quote
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quote:
Why is it that they don't offer a light mag load for the 7mmRemMag??


Because they call the 7mmremmag load the heavy mag.
 
Posts: 3104 | Location: alberta,canada | Registered: 28 January 2002Reply With Quote
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CanadianLefty, below are the QL computations for the 300 Win Mag and 30-06 Ackley Improved with 26" barrels. I load to 65,000 PSI and use the slowest burning powder that will achieve 65,000 PSI, given the case capacity. This is what Hornady and Federal are doing with their Light Magnuma and High Energy ammo; they've perfected a mass production means of tapping and compressing powder. I tap and compress by hand. See for yourself - rather spectacular performance can be achieved with this technique and still stay at or below 65,000 PSI.

Cartridge: .300 Win. Mag.(N)
Bullet: .308, 165, NOS BalTip 30165
Cartridge O.A.L: 3.340 inch or 84.84 mm
Barrel Length: 26.0 inch or 660.4 mm

Predicted Data for Indicated Charges of the Following Powders. Matching Maximum Pressure: 65000 psi, or 448 Mpa or a maximum loading ratio or filling of 120 %. These calculations refer to your specified settings in QuickLOAD 'Cartridge Dimensions' window.

C A U T I O N : any load listed can result in a powder charge that falls below minimum suggested loads or exceeds maximum suggested loads as presented in current handloading manuals. Understand that all of the listed powders can be unsuitable for the given combination of cartridge, bullet and gun. Actual load order can vary, depending upon lot-to-lot powder and component variations.USE ONLY FOR COMPARISON !

%fill grs. fps
ADI AR 2218 115.4 97.1 3401
Hodgdon H870 117.9 97.1 3399
Hodgdon Retumbo 112.5 89.3 3371
Norma MRP 2 111.8 88.2 3363
Norma MRP 102.6 83.6 3359
Alliant Reloder-25 109.6 86.0 3359
Vihtavuori N560 101.2 83.4 3359
RamMag (Big Boy) 105.6 89.2 3357
IMR 7828 SSC 102.1 82.8 3347
Accurate MAGPRO 103.8 86.9 3346
Alliant Reloder-22 103.6 82.7 3331


Cartridge: .30-06 Ack Imp
Bullet: .308, 165, NOS BalTip 30165
Cartridge O.A.L.: 3.332 inch or 84.63 mm
Barrel Length: 26.0 inch or 660.4 mm

Predicted Data for Indicated Charges of the Following Powders. Matching Maximum Pressure: 65000 psi, or 448 Mpa or a maximum loading ratio or filling of 120 %

Norma MRP 113.5 70.2 3231
Vihtavuori N560 111.5 69.8 3208
Alliant Reloder-25 120.0 71.5 3205
Accurate MAGPRO 114.5 72.7 3194
Alliant Reloder-22 114.3 69.3 3193
Winchester WXR 113.0 69.6 3192
IMR 7828 SSC 111.8 68.8 3175
Ramshot Hunter 102.7 65.6 3146
Alliant Reloder-19 111.7 66.2 3141
Winchester 760 100.4 63.4 3141
ADI AR 2209 106.1 65.3 3134
IMR 4350 104.8 62.1 3129
 
Posts: 3720 | Registered: 03 March 2005Reply With Quote
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Guys,

Part of the secret for hornady light magnums is thinner brass...weigh a hornady case that is a light mag case vs a non light mag case...IIRC there was about 15 grns difference in 7x57 cases and about 12 in 308 cases...but that is from memory


Mike

Legistine actu quod scripsi?

Never under estimate the internet community's ability to reply to your post with their personal rant about their tangentially related, single occurrence issue.




What I have learned on AR, since 2001:
1. The proper answer to: Where is the best place in town to get a steak dinner? is…You should go to Mel's Diner and get the fried chicken.
2. Big game animals can tell the difference between .015 of an inch in diameter, 15 grains of bullet weight, and 150 fps.
3. There is a difference in the performance of two identical projectiles launched at the same velocity if they came from different cartridges.
4. While a double rifle is the perfect DGR, every 375HH bolt gun needs to be modified to carry at least 5 down.
5. While a floor plate and detachable box magazine both use a mechanical latch, only the floor plate latch is reliable. Disregard the fact that every modern military rifle uses a detachable box magazine.
6. The Remington 700 is unreliable regardless of the fact it is the basis of the USMC M40 sniper rifle for 40+ years with no changes to the receiver or extractor and is the choice of more military and law enforcement sniper units than any other rifle.
7. PF actions are not suitable for a DGR and it is irrelevant that the M1, M14, M16, & AK47 which were designed for hunting men that can shoot back are all PF actions.
8. 95 deg F in Africa is different than 95 deg F in TX or CA and that is why you must worry about ammunition temperature in Africa (even though most safaris take place in winter) but not in TX or in CA.
9. The size of a ding in a gun's finish doesn't matter, what matters is whether it’s a safe ding or not.
10. 1 in a row is a trend, 2 in a row is statistically significant, and 3 in a row is an irrefutable fact.
11. Never buy a WSM or RCM cartridge for a safari rifle or your go to rifle in the USA because if they lose your ammo you can't find replacement ammo but don't worry 280 Rem, 338-06, 35 Whelen, and all Weatherby cartridges abound in Africa and back country stores.
12. A well hit animal can run 75 yds. in the open and suddenly drop with no initial blood trail, but the one I shot from 200 yds. away that ran 10 yds. and disappeared into a thicket and was not found was lost because the bullet penciled thru. I am 100% certain of this even though I have no physical evidence.
13. A 300 Win Mag is a 500 yard elk cartridge but a 308 Win is not a 300 yard elk cartridge even though the same bullet is travelling at the same velocity at those respective distances.
 
Posts: 10183 | Location: Loving retirement in Boise, ID | Registered: 16 December 2003Reply With Quote
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I've shot the Hornady LM's out of my 22" barrel .270 in the 130 gr SST config. I actually still have the data in my chronograph. It was a pretty hot day that day, and if anything it seemed like there was quite a variance in velocity. It seemed to me that velocity would climb slightly after shooting a lot and I guess having a little more fowling in my barrel? I would run a bore snake through the barrel when I thought the velocities were high and then it would generally drop back down on the next shot. Unfortunately I don't remember exactly when the cleaning was done in with respect to these shot strings, but maybe the data will show it.
3100,3144,3205,3093,3108,3093,3122,3108,3122,
3167 AVG= 3126

3159,3129,3167,3205,3182,3129,3167,3144,3167,
3167,3205 AVG= 3165

3189,3236,3259,3205,3144,3197 AVG= 3205

I believe Hornady posts the MV for this round at 3215 fps. Keep in mind I was shooting out of a 22" barrel.

They generally group around 3/4" at 100 yds. I will say though that I'm not totally confident about their consistency, and while a NBT isn't much different from a SST bullet performance-wise, Federal Ammo loaded with NBT's consistently shoot 1/2" at 100 yards. I'd actually like to see Federal load TSX's in their high energy rounds...for the time being until I have time to reload.

Anyway, that's the data I have. Hope it is a little bit insightful.

-Conrad
 
Posts: 27 | Location: TX | Registered: 16 April 2002Reply With Quote
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Conrad
I would have to say if you have a 270 that shoots those 2 factory loads into 3/4" and 1/2" you have a mighty fine 270. Big Grin


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Posts: 16134 | Location: Texas | Registered: 06 April 2002Reply With Quote
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I do like it a lot, and I only had the trigger lightened and "crisped" just a tad Smiler. It shoots Remington 130 gr PSP's just as well. Said rifle is a Browning A-Bolt stainless stalker with LH bolt because I'm a lefty, and was a gift from my dad.
 
Posts: 27 | Location: TX | Registered: 16 April 2002Reply With Quote
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I have been using a .243 with Hornady light magnums for Texas deer (not too many 250 lb bucks down here) and javelinas. Accuracy and performance were fine out to 250 yds. Group size was in the range of 1-1/2" at 100 yds from the bench. Most of my shooting at the range is from standing or sitting position - I figure I am the inaccurate element in shooting at game - not the rifle or the ammo.


Liberals believe that criminals are just like them and guns cause crimes. Conservatives believe criminals are different and that it is the criminals that cause crimes. Maybe both are right and the solution is to keep guns away from liberals.
 
Posts: 141 | Registered: 14 October 2004Reply With Quote
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quote:
Originally posted by Mike_Dettorre:
Guys,

Part of the secret for hornady light magnums is thinner brass...weigh a hornady case that is a light mag case vs a non light mag case...IIRC there was about 15 grns difference in 7x57 cases and about 12 in 308 cases...but that is from memory


I weighed some once fried 3006 brass I have and found the following:
Hornady Light Mag------192 grains
Federal----------------206.5 grains
Remington--------------198 grains
Lapua------------------195.5 grains

I got these weights by weighing three randomly selected cases which still had the primers in them.

I fried three shots of Hornady 165 BTSP Light Mags in two rifles, one with a 24" barrel and the other with a 26" barrel, over my Ohler 35 P and got the following:
24" barrel 2941FPS Mean, 20FPS extreme spread and SD 10
26" barrel 2961FPS Mean, extreme spread 17 and SD 9. I know that this is a very small sample but it is all I have.
 
Posts: 25 | Location: Northern California | Registered: 04 January 2005Reply With Quote
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I forgot to mention that Hornady claimed 3015 FPS for it 165 Light Mag load.
 
Posts: 25 | Location: Northern California | Registered: 04 January 2005Reply With Quote
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quote:
Originally posted by mjs3240:
quote:
Originally posted by Mike_Dettorre:
Guys,

Part of the secret for hornady light magnums is thinner brass...weigh a hornady case that is a light mag case vs a non light mag case...IIRC there was about 15 grns difference in 7x57 cases and about 12 in 308 cases...but that is from memory


I weighed some once fried 3006 brass I have and found the following:
Hornady Light Mag------192 grains
Federal----------------206.5 grains
Remington--------------198 grains
Lapua------------------195.5 grains




I have not gotten into reloading yet, but have saved all my brass from the factory rounds that I have bought. I have a fair amount of Remington brass, Federal, and a few boxes from the Light Mag stuff. Because it is thinner, and more capacity available I will be able to get more powder in them myself correct? Provided that I stay at safe pressures, would rounds created from that brass essentially be my own hot rounds? However at the same time would this thinner brass not have good durability and cause other problems? What do yall think??
 
Posts: 27 | Location: TX | Registered: 16 April 2002Reply With Quote
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