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Posted: 3/13/2011 10:51:22 PM EDT
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I am building an upper with a RRA upper and looks like a WOA Varmint barrel. 99% of the bullets that will be fired from this will be Fed. TRU, 55 gr Nosler Ballistic tip ( because that is what is issued to me ) And more than likely I will not shoot anything lighter and nothing heavier than 70/75 gr. Will the 1:7 twist be too fast or more likely to tear the bullet apart? And would I be better served with the 1:8? I have read many post on here about twist rates regarding the two I am speaking of, but wasn't sure if understood them correctly.
Thank you in advance for any input provided. 
__________________________________________ The wicked flee when no man pursueth: but the righteous are bold as a lion- Proverbs 28:1 |
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While the 1:7 won't cause lighter to bullets fly apart, it's not optimal for target shooting (which is what it sounds like you'll be doing) with 55gr bullets.
1:8 or slower would be better if you want to get better accuracy out of lighter bullets and never intend/expect to shoot the heavier ones (with optimal accuracy). |
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Quoted:
While the 1:7 won't cause lighter to bullets fly apart, it's not optimal for target shooting (which is what it sounds like you'll be doing) with 55gr bullets. 1:8 or slower would be better if you want to get better accuracy out of lighter bullets and never intend/expect to shoot the heavier ones (with optimal accuracy). my 1x7 barrel will shoot 52s just as well as shooting my 80s. Other HP shooters can attest to that as well |
| either will work fine. My personal belief is that 1:8 is a better comprimise given the bullet weights you will be shooting –– with one exception. If you think you might want to shoot the Barnes 70 gr TSXs, go with the 1:7. Many 1:8s can not stabilize that bullet even though Barnes recommends 1:8 or faster. |
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