I recently got 2 .. 700 mm CZ unchoke barrels.. n the lead in is pretty deep.. so before I have them machined for my use, for what I have read here.. max weight for. 22 , would be 40gr and for the .25 - 60gr .. would that be correct ?? .. keeping in mind that there is no power limit in the AF guns .. they could be push as hard as needed..thanks
1-17,7 - Twist 22 n 25 max weight - ??
- Thread starter mercado
- Start date
Hi I have shot 22 calibers accurate over 60 grain . om my 257 i have shot 118 grain accurately but i normally love the 73 gr rcbs slugs , however I just got a gmi swag press and now i can swage cutom ammo i just made some 60 grainers to test out but will shoot next week , so with no power restrictions the sky is the limit for weight as long as twist is fast enough ,
as a rule of thumb u can check groups but in general , here is a basic caculator if you put in your inputs LOU
bergerbullets.com
as a rule of thumb u can check groups but in general , here is a basic caculator if you put in your inputs LOU
Twist Rate Stability Calculator Updated
We’re happy to announce a major upgrade to our Twist Rate Stability Calculator which is available for free on the Berger Bullets webpage. The old stability calculator was pretty basic, and would simply return a gyroscopic stability number based on your bullet, twist rate and atmospheric conditions.
bergerbullets.com 
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For heavy lead.. after 2 years + I finally have a competent machinists to work on my other AF barrels.. by the end of the month finally I will have my. 224 barrels here .30" 3/4 long 1-8 - 1-9 and 1-10 to test and my fast .257 by the end of next month.. 33" long 1-8 - 1-9 n 1-12 those other 2 condor SS frames have Doug valves n heavy springs + 115grams hammers.. waiting for the barrels only ..Hi I have shot 22 calibers accurate over 60 grain . om my 257 i have shot 118 grain accurately but i normally love the 73 gr rcbs slugs , however I just got a gmi swag press and now i can swage cutom ammo i just made some 60 grainers to test out but will shoot next week , so with no power restrictions the sky is the limit for weight as long as twist is fast enough ,
as a rule of thumb u can check groups but in general , here is a basic caculator if you put in your inputs LOU
Twist Rate Stability Calculator Updated
We’re happy to announce a major upgrade to our Twist Rate Stability Calculator which is available for free on the Berger Bullets webpage. The old stability calculator was pretty basic, and would simply return a gyroscopic stability number based on your bullet, twist rate and atmospheric conditions.
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ok I think I am running a 118 gram hammer with not a real heavy spring so it cocks not hoo hard , I run a angled pcp tunes extreme valve in ,,257 I got a 30inch and custom screw on shroud with like 8 baffles , and I also run a lucifer 1000cc tank I fill to 3800psi ,
this was one of my best groups with my condor using a 73 grain rcbs I casted and sized to ,257 and lubed with a rcbs lubeamatic .
this was one of my best groups with my condor using a 73 grain rcbs I casted and sized to ,257 and lubed with a rcbs lubeamatic .
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