Texas Sheepdawg wrote:I’m just wondering if your twist rate might spin them apart upon leaving the muzzle. Looks tempting though. Keep us posted.
i have spun cast powder coated bullets into lead splatter - but that was in a 7 twist blackout at velocity's in excess of 1800 FPS - well beyond the design limitations of that peticular bullet (they were intended for 1400-1500 fps loads). i was using jacketed bullet data and getting much higher velocity's than anticipated. they never got to the target and just turned into a spray of lead schmoo....
but that was more of a measure of the RPM of the bullet than the velocity
MV * 720 / twist = rpm
1400*720/7= 144,000 rpm
1800*720/7= 185143 rom
2000*720/7= 205714 rpm
however if we look at rpm vs the common twist rates in the 450
1500*720/16= 67,500 rpm
1500*720/24= 45,000 rpm
1800*720/16= 81,000 rpm
1800*720/24= 54,000 rpm
2200*720/16 = 99,000 rpm
2200*720/24 = 66,000 rpm
you can see that even a HOT load in our beloved 450 bushmaster with a fast twist barrel doenst even break into the 100k RPM window. Now that said, i'm not claiming to know the RPM limitations of the bullets in question, just showing how because of the relatively *slow* twist rates this caliber utilizes that these bullets will be spinning much slower than when i acheived cast bullet failure in the past with my above example. with these being WW thats quenched, i'd suspect they could be run quite warm before failure occurs though as its a good hard mix, generally speaking.