The Accurate Reloading Forums THE ACCURATE RELOADING.COM FORUMS Guns, Politics, Gunsmithing & Reloading Reloading Typical Nosler Partition seating depth that works?!Go | New | Find | Notify | Tools | Reply | |
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I was wondering if the AR members have a typical seating depth, off the lands, that just seems to consistently work with Nosler Partitions in a hunting rifle. I know, "find what the rifle likes". With that in mind, I think their are members who may have found a sweet spot that usually works. Alan  | ||
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NO.but here you go. 243=.040 260=.035 270=.025 06 =.060 338=.020 | |||
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In My 308win, they have to be .100" short of the lands to fit the magazine so that is my sweet spot. They shoot about 1.25" at 100 yds with a near maximum powder charge and that is more than good enough for the hunting I do so I don't try and fix what aint broke. Best of Luck, Cheers, Jason But what do I know? | |||
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I've been experimenting with NP's in my 300 Win Mag lately. I shoot a Tikka T3 which is has a clip magazine so I really can't go much more than the SAAMI length of 3.6 inches. So I'm set at exactly that and I'm getting easily sub 1" groups. | |||
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Any idea how far off the lands you are? Alan | |||
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7mmNut, In my 257 Roberts, I just shot an Audette ladder on Saturday and two days back a round of 100 yd groups narrowing the accuracy node down to a small powder charge region; basically 45 gr of H4831sc and the 120 Pt for about 2900 fps. Give or take .4 gr I was seeing 1.1 to 1.25" 4-shot groups; for this rifle, pretty good! These are all .010" off the lands. I just finished reading Eric Stecker's piece on finding the proper seating depth http://02b0516.netsolhost.com/blog1/?p=43 Even though it was written for VLD bullets, I would think it would work for most any bullet so in the next week or so, I'll flesh out this stuff with my Rob and see where it takes me. Thanks for the replies. Alan | |||
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Alan, I would strongly encourage you to tread carefully when this close to the lands. You're getting very close to being right on them. I have had the misfortune of being (due to my error) in this region only once which led to an adverse pressure event. In the end only the rifle was hurt and as a result my wallet, it could have been worse. I would not assume Mr. Stecker's results would work or be safe for all bullets. | |||
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Somewhere between .020" to maybe .100" off the lands should do it. | |||
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-.0275 .. its my starting point... and i go BACK.. -.030 tends to work good opinions vary band of bubbas and STC hunting Club Information on Ammoguide about the416AR, 458AR, 470AR, 500AR What is an AR round? Case Drawings 416-458-470AR and 500AR. 476AR, http://www.weaponsmith.com | |||
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You are correct.
 There is no Magic Sweet Spot. Was this a Test?  | |||
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300WM 3.340???  | |||
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You are of course correct sir. I think must have been thinking of my .375H&H. | |||
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The variation is in the rifle not in the bullet; therefore, the likelihood of there being "golden sweet spot" is about zero. if its hunting rifle I would not go closer then 10/1000 off the lands. 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. | |||
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Here are some results from my latest trip out on Saturday am. 10 thou off = 25 Es, 2912 fps, 12 Sd, 1.695" av of two 3-shot groups. This is what I worked my load up to at this point. 50 thou off = 23 Es, 2910 fps, 7 Sd, 1.275" av of two 3-shot groups. 90 thou off = 73 Es, 2913 fps, 29 Sd, 1.77" av of two 3-shot groups. 120 thou off = 80 Es, stopped the test. Glad I completed this test as I see a bit of improvement with the 50 thou off test. Just FYI. Alan | |||
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The Accurate Reloading Forums THE ACCURATE RELOADING.COM FORUMS Guns, Politics, Gunsmithing & Reloading Reloading Typical Nosler Partition seating depth that works?!
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