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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
375 cal barrel twist and projectiles?
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<blockquote data-quote="Augustus" data-source="post: 403797" data-attributes="member: 10142"><p>I am pretty sure the ZA seven cal is going to be stable out of a 5.5 exit twist at least to 3000 FPS, unfortunateley it will be some time before I can test them due to lag time on barrels right now. I have never stated these bullets must have gain twist barrels. A constant 5.5 may work, its never been tried so who knows. My barrel is not a variable twist , the rate is linear and it works fine.</p><p> </p><p>The three shots I took were not scattered all over the place, I left out the details of the group because it was only three shots and I dont believe anyone should advertise accuracy potential of a system based on a limited sample. I can tell you it was much better than I expected and had you been standing in the targets place you would be needing the services of an undertaker. The 1020 yd group was posted because I am confident it is repeatable due to its performance at 700-900 yds.</p><p> </p><p>The transonic stability of the 6.5 and 7 cals is still an unknown, I will answer this question in the case of the 6.5 within a couple of wks. </p><p> </p><p> You are correct in stating all of the stuff I have been posting is experimental. If you read what I have posted over the last 1 1/2 yrs you will find on numerous occassions I have urged restraint to people wanting to buy barrels and bullets. I am doing this testing on my own with no expectation of returns or favors from anyone. So again, I am not advocating that anyone buy gain twist barrels or banded bullets, I am simply shooting these things and sharing what I found out.</p><p> </p><p>I have also posted that the ZA 6 cal works really nice from the Lawton 8 twist standard bore. Word to the wise, be careful when using the word NEVER and ALWAYS, they have a nasty habit of biting your *** in front of folks. Many stellar reputations have been wrecked due to the overuse of those two little words.</p></blockquote><p></p>
[QUOTE="Augustus, post: 403797, member: 10142"] I am pretty sure the ZA seven cal is going to be stable out of a 5.5 exit twist at least to 3000 FPS, unfortunateley it will be some time before I can test them due to lag time on barrels right now. I have never stated these bullets must have gain twist barrels. A constant 5.5 may work, its never been tried so who knows. My barrel is not a variable twist , the rate is linear and it works fine. The three shots I took were not scattered all over the place, I left out the details of the group because it was only three shots and I dont believe anyone should advertise accuracy potential of a system based on a limited sample. I can tell you it was much better than I expected and had you been standing in the targets place you would be needing the services of an undertaker. The 1020 yd group was posted because I am confident it is repeatable due to its performance at 700-900 yds. The transonic stability of the 6.5 and 7 cals is still an unknown, I will answer this question in the case of the 6.5 within a couple of wks. You are correct in stating all of the stuff I have been posting is experimental. If you read what I have posted over the last 1 1/2 yrs you will find on numerous occassions I have urged restraint to people wanting to buy barrels and bullets. I am doing this testing on my own with no expectation of returns or favors from anyone. So again, I am not advocating that anyone buy gain twist barrels or banded bullets, I am simply shooting these things and sharing what I found out. I have also posted that the ZA 6 cal works really nice from the Lawton 8 twist standard bore. Word to the wise, be careful when using the word NEVER and ALWAYS, they have a nasty habit of biting your *** in front of folks. Many stellar reputations have been wrecked due to the overuse of those two little words. [/QUOTE]
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375 cal barrel twist and projectiles?
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