daviscustom
09-13-2012, 06:53 PM
Not sure which forum this fits in.....but this started life as a factory rifle so here goes.
I need some input from the cast boolit experts on a rifle I am getting ready to build. It will be chambered in 50 Hushpuppy (.510 cal bullet in a 7 wsm case cut at the shoulder). I am using a Savage Axis action for the build and I need input on the proper twist rate to use for cast boolits. The subsonic round uses 50 bmg bullets for jacketed projectiles....and that is what originally got my attention, along with the availability of pulled surplus bullets for cheap. After the glitz faded from the big jacketed bullets, I realized that they are just going to plow through what ever they hit and never have any chance of expansion or transferring much energy to the target in a hunting situation.
I have always assumed that I would experiment with casting BIG boolits for this rifle, but now that has become my primary interest..... to the point that I wonder if I am making a mistake by choosing a fast twist barrel (1:10 twist) that would be the standard choice for heavy jacketed bullets fired at subsonic velocities (about 1000 fps). It has been suggested that for lead I should be getting a slower twist. My plan is to be casting 600-800+ grn boolits for this rifle, so that is the first thing I need input on.....what twist will stabilize these big pills and not strip the sides off the bullet in the rifling?
This will be a short barrel, only around 17", and as you may have guessed (being a subsonic round) it will be a suppressed rifle.
My interest in bullet designs will be in maximum energy transfer to the target along with designs that will maximize long range (300 yard ballpark or more hopefully) accuracy. The more aerodynamic the better but looking at flat points, hollow points, and hollow points designed to carry a small jacketed bullet to force expansion.
Any input is welcome.
I need some input from the cast boolit experts on a rifle I am getting ready to build. It will be chambered in 50 Hushpuppy (.510 cal bullet in a 7 wsm case cut at the shoulder). I am using a Savage Axis action for the build and I need input on the proper twist rate to use for cast boolits. The subsonic round uses 50 bmg bullets for jacketed projectiles....and that is what originally got my attention, along with the availability of pulled surplus bullets for cheap. After the glitz faded from the big jacketed bullets, I realized that they are just going to plow through what ever they hit and never have any chance of expansion or transferring much energy to the target in a hunting situation.
I have always assumed that I would experiment with casting BIG boolits for this rifle, but now that has become my primary interest..... to the point that I wonder if I am making a mistake by choosing a fast twist barrel (1:10 twist) that would be the standard choice for heavy jacketed bullets fired at subsonic velocities (about 1000 fps). It has been suggested that for lead I should be getting a slower twist. My plan is to be casting 600-800+ grn boolits for this rifle, so that is the first thing I need input on.....what twist will stabilize these big pills and not strip the sides off the bullet in the rifling?
This will be a short barrel, only around 17", and as you may have guessed (being a subsonic round) it will be a suppressed rifle.
My interest in bullet designs will be in maximum energy transfer to the target along with designs that will maximize long range (300 yard ballpark or more hopefully) accuracy. The more aerodynamic the better but looking at flat points, hollow points, and hollow points designed to carry a small jacketed bullet to force expansion.
Any input is welcome.