Orange Dust
Well-Known Member
Wonder what would happen with a 3r gain twist going from about an 8 to a 6 and a 130gr hammer started about 3400? Be bad news for anything it hit, if it wouldn't strip the rifling.
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What twist?
- Thread starter RCMSTER
- Start date
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Orange Dust
Well-Known Member
You all got me thinking. My RUM could use a new barrel. One has to wonder just how heavy a hammer you could break 4k fps with the 300 RUM and a barrel like I posted above. It kills deer like Thor's hammer with bonded 200 gr bullets now. It would be like shooting lightning bolts... Hum....
Mines a 10 twist and @ 4218 the SF is 3.2
sorry it's not as much as I thought with heavy bullets. Barrel whip might be increased on smaller diameter barrels
Does Barrel Twist Rate Affect Muzzle Velocity? (Litz Test) « Daily Bulletin
The Applied Ballistics team tested six (6) same-length/same-contour Bartlein barrels to observe how twist rate might affect muzzle velocity. This unique, multi-barrel test is featured in the book <a href=http://www.amazon.
Orange Dust
Well-Known Member
What bullet weight Butterbean? Mine is a 10 now
The 124 HH
Orange Dust
Well-Known Member
I'm going to get some to play with. 2 more quick questions. You use a faster powder or retumbo? How bad do they tear deer up? I blew one in half with a 190ablr
Yes use a faster powder and they don't tear anything up
Orange Dust
Well-Known Member
Thanks Buddy
Just Holler if you need anything 812-264-6183
lancetkenyon
Well-Known Member
I had a 1:10" .25-06AI for 12+ years. Shot a 115 @ 3450fps, or 100 TTSX @ 3600+.
My 1:7.5" 25SST can push the 131 BJ @ 3300+, and I am running the 121 HH @ 3414fps. Am working on the 135 LR Hyb too. All are insanely accurate. So use this for comparable speeds. I kind of want to test the 115 VLD, but really have no use for them.
A buddy's straight 1:10" .25-06 is pushing the 100TTSX @ 3420 at the top end. He can get the 115 VLD to 3270.
I would not go down to a 1:8" in my 25SST. So in your slightly slower .25-06, if it were me, I would go 1:7.5" too. Unless you are considering the 128 Hammer Hunter as well. Then the 1:7" makes sense. But unless you are shooting very thin jacketed varmint bullets at 3600+, you will be fine.
My 1:7.5" 25SST can push the 131 BJ @ 3300+, and I am running the 121 HH @ 3414fps. Am working on the 135 LR Hyb too. All are insanely accurate. So use this for comparable speeds. I kind of want to test the 115 VLD, but really have no use for them.
A buddy's straight 1:10" .25-06 is pushing the 100TTSX @ 3420 at the top end. He can get the 115 VLD to 3270.
I would not go down to a 1:8" in my 25SST. So in your slightly slower .25-06, if it were me, I would go 1:7.5" too. Unless you are considering the 128 Hammer Hunter as well. Then the 1:7" makes sense. But unless you are shooting very thin jacketed varmint bullets at 3600+, you will be fine.
Thank you Sir. Appreciate the information. I was thinking the 1-7.5" with the feedback I've received. I have a NIB Remington 700 ultimate I'm going to put on the market pretty soon, and assuming I can get a grand for it, I'm going to send my 70 Winchester to Hill Country Rifles and have them rebarrel it and cerakote it.
That's good to know. I just got my barrel 1:7" for my .257 WBTY build primarily for the 133 Berger.
Hard rock
Well-Known Member
The main reason I went with 1-8 instead of 1-7.5 was the wait time . I went with the Douglas xx premium air gage ,they don't want do half twist . I had my barrel back chambered and headspaced in 3 weeks . The other barrel makers had a 6 month too a yr or more wait time Bartlein etc but they will build any thing you want good luck on your new build
