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Posted: 9/23/2004 5:23:34 PM EST
Will a 16" barrel in 1:9 twist rate stabilize the 75gr Hornady HPBT for at least 25 yards? Possibly out to 50 yards?

Not sure how much stabilization counts for under 25yard use, but I am curious as to how useful this bullet would be in a 25yard max defensive role.

Sorry for the newbie question, been searching around and haven't come up with twist rate info for this weight specific to short range.

Link Posted: 9/24/2004 3:43:29 AM EST
Link Posted: 9/24/2004 5:09:33 AM EST
Paul gave it to you exactly right. YOUR 1/9 barrel may stabalize 75/77 gr bullets and it may not. I have one 20" 1/9 that sprays 75 gr. Horny's around like a buckshot pattern but will put 77 gr. SMK's into 1/2 MOA all day long.

Only one way to find out. Buy some of each and head to the range.


Link Posted: 9/24/2004 5:11:32 AM EST

Originally Posted By Dont-Tread-On-Me:
Will a 16" barrel in 1:9 twist rate stabilize the 75gr Hornady HPBT for at least 25 yards? Possibly out to 50 yards?

Depends on the barrel - buy a box and try it out.

All my 1:9s stabilize the 75gr Hornady OTM to 100y minimum (14.5", 16" and 20").
Link Posted: 9/24/2004 6:04:05 PM EST
All I can say is wow!

Thank you for your honest and informative posts. You guys rock.

I will test these loads 65+ grain, starting from short range and move the range out to see when they keyhole. I think the whole 75-77 grain load thing is a fad, in that it is like splitting hairs when it comes to defense. It isn't as if 55-62 grain so ineffective to demand a move up to these. But if they do offer more, more is always better, so it is worth a try. I do not feel undergunned with 55-62 grain 223 in any bullet that will fragment or expand.

I like having choices.

Link Posted: 9/25/2004 2:33:01 AM EST
The 75 grain Hornady bullets are the most accurate that I have shot through my 16inch barreled 1/9 twist Colt AR. However, I have only shot them at about 100 meters and it was on a 60 degree day. They shot into around an inch at that range.
Link Posted: 9/25/2004 10:31:26 AM EST
Link Posted: 9/25/2004 12:05:44 PM EST
I haven't read much about it. What I meant was, a regular .223 isn't something to sneeze at. In other words, I wouldn't feel undergunned at all.

Like I said, if these do put out that high of a % extra, more IS better.
Link Posted: 9/25/2004 1:23:07 PM EST
Link Posted: 9/25/2004 5:57:52 PM EST
Hornady 75's are the heaviest bullet that shoots well in my 1/9 Bushy 20". My theory is the Hornady 75 gr HP is softer or larger diameter. Either trait would increase engagement with the barrel lands. The bullets have to engage the rifling to get the full value of twist out of the barrel.

A bullet that tumbles through the paper at 10 yards must be bouncing down the barrel. Are you sure it wasn't loaded backwards?
Link Posted: 9/30/2004 4:30:35 AM EST
Link Posted: 9/30/2004 6:35:10 AM EST

My 20" 1:9 could stabilize well at 200 meters.
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