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So for the 77 you need a what twist rate?. will the 75's work with 1/8? Mb
" Cheapest velocity in the world comes from a long barrel and I sure do like them. MB "
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Joined: Jul 2015
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Campfire Outfitter
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Campfire Outfitter
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So for the 77 you need a what twist rate?. will the 75's work with 1/8? Mb Yes. I like a minimum of 8" twist for 75/77s. Some 9 twist barrels will shoot them fine, but there aren't any guarantees on that.
Politics is War by Other Means
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Joined: Jan 2017
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Campfire Outfitter
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Thanks Tyrone I thought I'd heard that the 1/8 was good for HORN 75 HPBT but didn't know if they would work wit Sierra 77's. Have to get some 77 and try them.
" Cheapest velocity in the world comes from a long barrel and I sure do like them. MB "
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Joined: Jan 2005
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Campfire Kahuna
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Campfire Kahuna
Joined: Jan 2005
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I couldn't get the 75 grain Hornady HPBT to shoot real well in a pair of AR's. So I tried some of the 77 TMK's which have been real good in the past and they shot better. I'd try a 100 of both before you decide, just cause either is a great bullet, seen both the 75 Hornady and 77 TMK work on coyotes up to deer pretty well. The Hornady is a pile less expensive, but if it doesn't shoot, it doesn't do you any good.
For me the 75gr HPBT doesn't do as well when pushed too fast. Try 23.5gr of Benchmark; that does about 2650-2680 fps in my 16" 223 Wylde barrel, and is more accurate than any of the 77gr SMK loads I found for the same barrel. With that said, the 69gr SMK was easy to find a good load for - a max charge (per Western Powders 6.0 5.56 load data) of XTerminator & seat to 2.255"; that one and the 65gr SGK shot consistently better than any of the 75/77gr stuff in that barrel, and considerably faster too. I did not have very good luck with the 69gr TMK, although I was hopeful. That's a 1:8 barrel, which is enough twist for all of the above, but the tipped bullets end up with so much jump to the lands that I think that's the problem. Exactly on the 75. Don't expect to push it hard, it gets wonky when pushed hard. That said I probably have a couple thousand loaded at maybe 24 of RL15, not really smoking hot and it works well enough. 77 smk beats it accuracy wise all day long. We got the 75s at good prices in the day so I used quite a few, actually used other H bullets by the cases, but the 75 we used for game. I've shot enough with either 75 bthp and 77 smk that either will work fine. I"ve seen a Boone and Crockett buck killed with 69 smks.... bang flop. No bones hit, well maybe ribs but nothing major. Around 177 net IIRC. Almost 50 inches of mass. I"ve never seen or shot TMK.
We can keep Larry Root and all his idiotic blabber and user names on here, but we can't get Ralph back..... Whiskey Tango Foxtrot, over....
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Campfire 'Bwana
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Campfire 'Bwana
Joined: Aug 2010
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Thanks Tyrone I thought I'd heard that the 1/8 was good for HORN 75 HPBT but didn't know if they would work wit Sierra 77's. Have to get some 77 and try them. 1 in 8 works great with the 77's: ![[Linked Image from i.imgur.com]](https://i.imgur.com/BWTKeED.jpg) ![[Linked Image from i.imgur.com]](https://i.imgur.com/4TneMTK.jpg) I just need to run them faster. Hopefully find a good accuracy node with the gas pedal mashed a bit more... 
I try to stick with the basics, they do so well. Nothing fancy mind you, just plain jane will get it done with style. You want to see an animal drop right now? Shoot him in the ear hole. BSA MAGA
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Campfire 'Bwana
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Campfire 'Bwana
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Dang, you guys are shooting longer range bullets in your AR's than i, have only shot stubby bullets in my house and farm 5.56/223's, I can say hand loaded 55/62gr TSX, 64gr Nosler bonded, and the Federal load with a 62/64 gr bullet, think it's a Bear Claw will work well on pigs, deer and coyotes out to around 190 yards.
None are very fast in the 16 inch barrels, 27-2800 fps, the Nosler bondeds, and Federal load has produced quicker kills for me, and show more reaction to the hit over the monos.
Trump Won!
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Joined: Jul 2015
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Campfire Outfitter
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Campfire Outfitter
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Dang, you guys are shooting longer range bullets in your AR's than i LOL! I'm sure you feel deprived! Not.
Politics is War by Other Means
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Joined: Sep 2006
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Campfire Ranger
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Campfire Ranger
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Dang, you guys are shooting longer range bullets in your AR's than i, have only shot stubby bullets in my house and farm 5.56/223's, Sounds like a personal problem that is easily remedied............................... MM
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Campfire Kahuna
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Campfire Kahuna
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Dang, you guys are shooting longer range bullets in your AR's than i, have only shot stubby bullets in my house and farm 5.56/223's, I can say hand loaded 55/62gr TSX, 64gr Nosler bonded, and the Federal load with a 62/64 gr bullet, think it's a Bear Claw will work well on pigs, deer and coyotes out to around 190 yards.
None are very fast in the 16 inch barrels, 27-2800 fps, the Nosler bondeds, and Federal load has produced quicker kills for me, and show more reaction to the hit over the monos. are the mono hits dead? LOL I snap shot at a pair of pigs the other night, 16 inch 223. Maybe a 60 yard shot as they were walking to the brush through tall grass.. I was waiting to line 2 up which I did. Hit with 50 grain old Speer big azz HP bullet. You'd think a 50 pound pig would flop... never even found sign of a hit. Though there were buzzards there the next day and been a pretty good stink up there now when we drive by for the last few days.. Dunno that the 52 barnes would have been better but I'd have bet the big HP would have ripped em wide open.... I'd have sure expected to walk up and see a dead one there just inside the brush line....
We can keep Larry Root and all his idiotic blabber and user names on here, but we can't get Ralph back..... Whiskey Tango Foxtrot, over....
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Joined: Jan 2007
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Campfire Outfitter
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Campfire Outfitter
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I never tried to 77 in an AR kind of figured they were a little long so do you guys at have have you tried the 75 eld's?
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Campfire 'Bwana
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Campfire 'Bwana
Joined: Sep 2009
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Dang, you guys are shooting longer range bullets in your AR's than i LOL! I'm sure you feel deprived! Not. Yes, deprived, LOL, all my 5.56/223 but one wear red dot sights, only one has a scope, I just dont run 'em long, much better hammers for stretching it for what I do, great house guns though.
Trump Won!
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Joined: Sep 2009
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Campfire 'Bwana
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Campfire 'Bwana
Joined: Sep 2009
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Dang, you guys are shooting longer range bullets in your AR's than i, have only shot stubby bullets in my house and farm 5.56/223's, Sounds like a personal problem that is easily remedied............................... MM Yes, it's called a 7.62 REPR with 2.5-10 NF. 
Trump Won!
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Joined: Sep 2009
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Campfire 'Bwana
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Campfire 'Bwana
Joined: Sep 2009
Posts: 46,253 Likes: 2 |
Dang, you guys are shooting longer range bullets in your AR's than i, have only shot stubby bullets in my house and farm 5.56/223's, I can say hand loaded 55/62gr TSX, 64gr Nosler bonded, and the Federal load with a 62/64 gr bullet, think it's a Bear Claw will work well on pigs, deer and coyotes out to around 190 yards.
None are very fast in the 16 inch barrels, 27-2800 fps, the Nosler bondeds, and Federal load has produced quicker kills for me, and show more reaction to the hit over the monos. are the mono hits dead? LOL I snap shot at a pair of pigs the other night, 16 inch 223. Maybe a 60 yard shot as they were walking to the brush through tall grass.. I was waiting to line 2 up which I did. Hit with 50 grain old Speer big azz HP bullet. You'd think a 50 pound pig would flop... never even found sign of a hit. Though there were buzzards there the next day and been a pretty good stink up there now when we drive by for the last few days.. Dunno that the 52 barnes would have been better but I'd have bet the big HP would have ripped em wide open.... I'd have sure expected to walk up and see a dead one there just inside the brush line.... Yes, dead, but not dead as quick, and many times not much reaction to a hit, the 'bonded' soft points have a hell of a splat factor "plus" plenty of penetration.
Trump Won!
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Joined: Aug 2010
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Campfire 'Bwana
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Campfire 'Bwana
Joined: Aug 2010
Posts: 48,131 Likes: 12 |
So how fast are you guys running these 77 grain bullets?
I try to stick with the basics, they do so well. Nothing fancy mind you, just plain jane will get it done with style. You want to see an animal drop right now? Shoot him in the ear hole. BSA MAGA
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Campfire Ranger
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Campfire Ranger
Joined: Sep 2006
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2725-2750 with an 18" barrel with AR-Comp, XBR-8208, Alliant 2000-MR.
MM
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Campfire Outfitter
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Campfire Outfitter
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This^^
2730 to 2750 seems to be the sweet spot in several of my rifles
Let's Go Brandon! FJB
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Campfire 'Bwana
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Campfire 'Bwana
Joined: Aug 2010
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2725-2750 with an 18" barrel with AR-Comp, XBR-8208, Alliant 2000-MR.
MM Ok, thats way above book loads and when i approached or exceeded 2700, they seemed a little stiff. What was quite surprising was the velocity differences i got, using 3 different 20" tubes and my savage predator with a 1 in 9 twist. I was surprised that tube stabilized the TMK quite well.
I try to stick with the basics, they do so well. Nothing fancy mind you, just plain jane will get it done with style. You want to see an animal drop right now? Shoot him in the ear hole. BSA MAGA
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Joined: Aug 2015
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Campfire Outfitter
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Campfire Outfitter
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Not above book, Hodgdon's 8208 XBR MAX load for a 77SMK is 23.2 gr. and 2,796 fps.
Western Powders, TAC, MAX 23.4 gr at 2,759 fps
Hodgdon, Benchmark MAX, 22.8gr at 2,763 fps
Last edited by NVhntr; 04/12/20.
Let's Go Brandon! FJB
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Joined: Aug 2010
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Campfire 'Bwana
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Campfire 'Bwana
Joined: Aug 2010
Posts: 48,131 Likes: 12 |
Not above book, Hodgdon's 8208 XBR MAX load for a 77SMK is 23.2 gr. and 2,796 fps.
Western Powders, TAC, MAX 23.4 gr at 2,759 fps
Hodgdon, Benchmark MAX, 22.8gr at 2,763 fps Its above book for ar comp. Go back and read my posts. Did you go to school in Nevada?
I try to stick with the basics, they do so well. Nothing fancy mind you, just plain jane will get it done with style. You want to see an animal drop right now? Shoot him in the ear hole. BSA MAGA
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Joined: Sep 2006
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Campfire Ranger
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Campfire Ranger
Joined: Sep 2006
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Remember that Alliant's info does not list a range of loads, only one, & that is labeled as 223, not 5.56. Here's a link to a large series of tests (about 12 episodes) attempting to duplicate BH MK-262 that you might find interesting...............be sure to look of the one that shows the data for the factory BH MK-262 (77gr SMK). In most cases, my data very closely resembles what he is getting. MM BH MK-262 testing8208 & AR-Comp4895 & MR-2000
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