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| one of us |
I am loading for a 7mm Dakota. I have found that the Hornady 139gr SST, which is of interlock design, is very accurate at 3450fps out of my 26" barrel. Previously have used the Barnes X with good results on caribou and moose. At the high velocity of a close range shot on a caribou, will the 139 SST hold together enough to give good penetration, or is it likely to blow up? I know the Barnes works well and minute of caribou doesn't exactly require a target rifle, but I was just wondering. | ||
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| one of us |
ACY: I shot a couple of Caribou last year, and a friend took a couple. We were using 175 Gr. Interlocks from 7 MM Rem. One of the bullets exploded at close range on one bull's shoulder. A 139 Gr. out of your rifle at that speed will not penetrate; the speed on the 175's was only 3000. ------------------ | |||
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| one of us |
My question is why use the 139 gr at all in the overgrown 7? I would suggest thet you go with the 162 gr hornady as the trajectory and wind drift factor is in your favour as well as more bullet weight to begin with.This can be a factor in the windy conditions of the North. This bullet has given excellent results for us. BR | |||
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| one of us |
I have to agree with Dave (Hi Dave). Those SST's at that speed and bullet weight won't hold together too well. - Dan | |||
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One of Us |
In a word, no. The SST although it has the Interlock feature, it was built to perform more or less like a Ballistic Tip. At those velocities, it will not hold up. 2700 fps should be about the max velocity for that bullet to perform. I shot an impala at 80 yards on the point of the shoulder with the animal quartering towards me with at 180gr Hornady out of a 300 Weatherby. I recovered the bullet in the off side paunch just in front of the ham. It weighed 85grs. I calculated the MV at around 3100 at that range. The impala dropped like a sack of potatoes, but I don't know if the effects would have been the same on a large animal. I would go with your Barnes X. | |||
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| <Mike Dettorre> |
The performance envelope on the interlok (non sst) is not much more than 2850 fps. Other wise you risk excess expansion and little penetration on impact. ------------------ The sole purpose of a rifle is to please its owner | ||
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| one of us |
Gee, thats funny I better stop using my 130gr spire point Hornadys at 3,060 fps, out of my .270win for Deer. I guess the deer didn't know that bullet was suppose to blow up on impact? I wonder how that exit wound got there? ------------------ "Everything that lives and moves will be food for you. Just as I gave you the green plants, I now give you everything." Genesis 9:3 [This message has been edited by Mark G (edited 05-09-2002).] | |||
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| <J Snyman> |
I don't hunt with one of those super duper flat shooting rifles, but with an ex-military sporterised .303 Brit rifle. I hunt mostly springbuck and shooting distances are under 250m. I reload my own ammo and have used Hornady Interlocks a lot. I launch a 174gr Roundnose at a "pedestrian" 2460f/sec and meat damage is acceptable at ranges over 100m. However a 150gr SP at 2650f/sec (muzzle velocity) causes extensive damage and I have stopped using them for hunting. According to my hunting results I would not recommend them for muzzle velocities exceeding 2400m unless you are a "sniper" going for head shots only. I am of the opinion that the same applies to all the "conventional" designs and would strongly recommend the use of a "premium" bullet. In South Africa we don't have the variety of premium bullets , especially for a .303 !, that you guys have, but they also work. I have now settled on a 215gr Core Bonded Solid Shank bullet manufactured by Rhino (www.rhinobullets.co.za) at 2060f/sec for close range work and a 140gr monolithic High Velocity Hollow Point by GS Custom (www.gscustom.co.za) at 2800f/sec for long range work. Meat damage is no problem any more and in my opinion the extra cost is more than worth it. | ||
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| One of Us |
gee, I guess you put the rifle right up to the deer and shot it huh? that's the only way to attain 3060 impact velocity out of a 270. If you read what he was asking, he was not talking about deer in the first place. Even Hornady recommends the 2700-2800 fps IMPACT velocity on their rounds for best performance. Much more above that and you might risk bulet failure. On a deer it's no big deal ,but on elk sized animals and larger, it might pose a problem, gee. | |||
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| one of us |
Gee, Jorge your the first person in this thread to mention "impact" velocity. All of the previous threads are refering to Muzzle velocity. Also, I did read the original question and it was in reference to caribou (not really the same league as a Big Bull Elk as too many of them are taken cleanly with lesser cartridges) My reply was to Mike Dettorre post, stating the perfomance envelope for Hornady bullets. Since all the prior post refered to Muzzle velocity then Logic would tell you his post was too. Ps I know what hornady recomends as far as the impact velocity goes though, but thank you for pointing that out to us. ------------------ "Everything that lives and moves will be food for you. Just as I gave you the green plants, I now give you everything." Genesis 9:3 [This message has been edited by Mark G (edited 05-09-2002).] [This message has been edited by Mark G (edited 05-09-2002).] | |||
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| <Don Martin29> |
If you must use those 139 conventional bullets I have an idea for you. Carry a couple of loads in you pocket of a heavier bullet! I have found that heavier bullet weights hit just about right on at shorter range when the rifle is sighted in for long range with a lighter bullet. I think there was agreement here that the ideal maxumum impact velocity for conventional bullets is 2700 fps and 2900 for premium's. | ||
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| <jeremy w> |
quote: They work great on deer and antelope. I've killed elk with them but they would be close to my last choice to use again. All the 140 .270's I recovered from the elk retained less than half their weight. More importantly, the bullet mushroomed back and then the "petals" all broke off. This left a bullet shank and a piss poor wound channel. With a deer or smaller I doubt enough resistance would be encountered to rip the "petals" off.
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| one of us |
I know this is off the original topic, but you guys are cracking me up. Can you even imagine how many deer have been taken with the .270win & 130gr standard bullets (ie: core-lokt, silver tip, Interlock, PP, etc) since the 1930's? I'm sorry, I've seen too many go down in my life, with stellar performance. On Elk and heavier game I agree with what you are saying 100%. ------------------ "Everything that lives and moves will be food for you. Just as I gave you the green plants, I now give you everything." Genesis 9:3 | |||
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| one of us |
I think what we are trying to get through is that the original poster has a Mega7mm, So why leave bullet integrity and weight to chjance when there are heavier bullets that have less drift and drop at long range? I am the first to defend the 1309 gr Sierra from 270, but that is 2900MuzzleV, not 3400 MuzzleV !! BR | |||
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one of us |
I like the Hornady Interlocks. However, I shot a doe last year with a 7mm 162 gr BT from a 7 RM. The doe was maybe 20 yds.The bullet left a baseball size hole on the near side ribcage. She was down at the shot but jumped up and took off at a dead run. I shot her again in the browneye and she was down for good.I have had the same trouble from Nosler 150 BT. I'll shoot Partitions from now on.Impact vel. has a lot to do with it. | |||
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| Moderator |
I posted this story last fall but I think it might warrant repeating. My son shot a nice mule deer buck at about 35yds with his 270, loaded with 140gr Hornady BTSP bullets. these chronographed an honest 2950fps muzzle velocity. Result was a very dead buck but the bullet came completely unglued inside the chest and never made an exit. I've killed my share of game over the years with that 270 but I have never once failed to get an exit on a deer or antelope, and many of those kills were made with Hornady bullets. I guess what I'm trying to say here is that Hornady bullet+very high muzzle velocity+ short range impact= ??????? Don't risk it, use a premium bullet like a Nosler partition and save yourself some grief. | |||
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| one of us |
If one insists on useing big magnum calibers, and I have nothing against them, they are wonderfull indeed, but for goodness sake use big heavy for caliber premium bullets in them such as a 175 gr. Nosler or A Frame or Monolithic like the GS HV.......and actually you could drop to a 160 gr. in the monolithics. I don't know why one would want more velocity than 3000 FPS tops for anything, at least for use in the hunting fields of the world... ------------------ | |||
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| One of Us |
Some very good observations and posts here gents. As always, you must match the bullet to the caliber and the game. FOr examplea Swift AFrame would be a poor choice for say a 2600 fps (MV) rifle for deer as it would probably zip through without expanding. My observation on a 180gr Hornady out of a 300 Weatherby at 80 yards on an impala says it all. One would think that the bullet should have zipped right through that lightly boned 80-90 lb animal. But pictures are worth 1000 words. Go to my website www.kateydid.com/hunter and you can see what was left of that 180gr Hornady after it dropped the impala. jorge | |||
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| one of us |
Jorge, I assume the hornady was the one on the far right. What were the other three, and what were they recovered from. Just courious. Nice pics by the way! ------------------ "Everything that lives and moves will be food for you. Just as I gave you the green plants, I now give you everything." Genesis 9:3 | |||
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one of us |
Ray, actually, I dropped all the way down to a 130 gr. HV in my 7mag for my elk last year. As suggested by Gerard, I might add. Still shot through the big boy, no problem. I like those HV's, yes, I do. Dutch. P.S. rumor has it the first distributor for G.S. is being set up in TX, should start shipping in weeks..... | |||
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| One of Us |
Mark: you assumed correctly. The other three slugs were all 300gr Swift A Frames ( 375 H&H mag) recovered froma zebra (125 yds) wildebeest, (60yds) and eland (175yds). jorge | |||
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| one of us |
Jorge, Can't tell by the picture if there's any lead left in that Hornady bullet or if that�s just the jacket, but if there is it looks like it did all right considering the (very) high impact velocity... I would almost expect 'standard' bullets to act like a varmint bullet when shot at extreme velocity. | |||
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| <Mike Dettorre> |
I should have been more clear in my comments. One of the fine and very bright gentleman on this forum did some extensive testing of several brands of bullets. If you interpret his charts optimum performance of the Interlok was with muzzle velocity in the 2700-2850 as I recall range was at 100 yds this would give an impact velocity in the 2500-2650 fps range. This provided maximum penetration for that bullet. Above that penetration actually reduced. Will every Interlok blow up with 3000 fps at he muzzle? of course not. But launch 130 grn 270 interlok at 3k and hit al elk or bear on the shoulder @ 50 yds you have reasonable chance of having a problem. ------------------ The sole purpose of a rifle is to please its owner [This message has been edited by Mike Dettorre (edited 05-11-2002).] [This message has been edited by Mike Dettorre (edited 05-12-2002).] | ||
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| one of us |
Just an observation. These Hornady Interlokts are loaded in factory Weatherby Ammo. Kinda makes me wonder why if they are apt to blow upon close impact. I remember using a few of the Old Hornadys(pre interlokt)in the old Weatherby Loadings years ago. I wasn't overly concerned about bullet performance back then. Just as long as they went where I pointed them and the critter died then everything was okay. Rich Elliott ------------------ | |||
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