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Hornady 75 bthp

I have a 223 RAR 22" 8 twist that did not shoot them particularly well but it did not shoot any factory ammo very well.
 
My 22" Savage stabilized them perfectly fine. I don't think you will have any problems unless yypu load them light.
 
Will a remington .223 with 20 inch barrel 1-9 twist stabilize these?

I have shot thousands of those from my 1:9 AR Service Rifle with perfect stability and excellent results. They have been a very good bullet for me in my AR.

Danny
 
I loaded up 2 rounds at 23.7 rl15,and shot them this morning just to see if they would stabilize in the remington.
They did not tumble,45 degrees,92% humidity.
Weather hasn't been good here,windy,cold,rainy.
Hopefully I can see about the accuracy soon.
If accuracy isn't good,I'll try them in my savage model 12, 7 twist barrel.
I know 68,69 will shoot in the remington,just curious if the 75's would shoot,since I've read they have in 9 twist barrels.
We will see hopefully in a few days.
 
My experience mirrors Danny's. I have a 1:9 DMR profile AR upper that eats 'em up. Shoots the 75 gr. BTHPs every bit as well as the 68/69 gr. bullets.
 
I had a Douglas 1/8 twist that was actually more like a 1/8.5 twist that wouldn't shoot them. Well, some days it would, some days it wouldn't. It drove me a bit bonkers until I figured out that the twist wasn't what it was advertised as. There were several of these barrels bought in a group buy and all of them were ~1/8.5 twist, all performed about the same. We were some unhappy campers.

Now days, I always buy something with a 1/7-something twist in .223.
 
The BTHP is significantly shorter than the same weight AMAX, hence works with a slower twist rate. One in nine is fine for it in all but the most adverse ambient conditions (low altitude, very low temperatures). The AMAX with its extra length is the reverse - in a true nine-inch twist, it'll just stabilise enough to produce round holes and reasonable groups in ideal conditions (very warm and the higher altitude the better). Even so, its Sg (coefficient of stability) value is way below optimum creating extra air-drag and reducing its actual BC, so there is little if any real benefit over a fully stabilised 69gn Sierra MK or similar.

Air conditions aside, some rifles with nominal 9-twist barrels will shoot this bullet, because they are actually a little faster twist than one in nine; others won't shoot it in almost any normal condition because they come of the rifling machine with something that is a bit slower.

The shorter 69s (68 Hornady / 69 Nosler/Sierra/Lapua) are optimal for this twist rate, the 70gn VLDs work in most conditions but are getting a bit on the long side for the twist rate, so can suffer in barrels with a slower than claimed rate. The 73gn Berger BT is IMO also a good choice for 223 rifles with this twist rate.
 
I have a few loads over 2230 loaded to mag length that I think I'll try in my Stag 1-9. I loaded these originally for a Shilen barreled bolt gun that was chambered with a SAAMI-spec .223. That barrel has since been throated and this thread has me wondering about their stability in the Stag.
 
Quick update,made it out to my range,very,very,promising.
A little wind blowing in from 1 oclock,to 7 oclock,around 8 mph.
If I hadn't pulled a shot on a couple of groups each,would have been very good groups.i was shooting 5 shot groups.
Looks like there gonna be just as accurate as the 68 and 69.
I'll post pictures later tonight
 
powder is rl15,cci br4,lc10 brass
all 5 shots


this next group i jerked the trigger

this group i pulled
 
24gr of RL15 or Varget are both known accurate loads for service rifle with any of the normal 75/77 grain bullets. I shoot 23.2gr of 8208 in mine. So if you have those powders as well, might give them a try, but do clean your barrel very well, 8208 and RL15 do funny things when fired after one another.
 
Is it possible rl15 just won't group that good in this rifle?
I shot some 68 bthp with varget,5 shot group into a very small group.
I think I'm gonna try varget with some more loads.
 
24.0 of RL15 with the 75gr BTHP from my 223's have been pretty awesome! seems when I try to push to higher velocities accuracy goes to crap! I've been working with some Accurate 2520 and while my AR's seem to like the powder by bolt rifle is having problems, thinking I need to find out how many rounds have been down the tube as it's one of my PDog rifles so it may be time :(

What I've seen and take it for what it's worth is that around 2600-2650fps seems to be where my accuracy has been, all 3 rifle have 1-9 twist barrels. I've had good luck with the Amax as well but like the BTHP my accuracy goes when I try to push them. Later,

Kirk
 
My 24", 9 twist, 5.56 chambered bolt gun shoots both the 75 BTHP and 75 AMAX more consistently than any other bullets I have tried. My best loads with both of the Hornady 75's use 8208 XBR. The BTHP is slightly faster @ 2857 vs the AMAX @ 2836.
 

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