can anyone assist with some hypothetical data on lighter cast bullets 300-350 grains(any bullet type) with unique, win-231 and Universal to about 900fps from 4-5 inch barrel. Wondering about charge weights and pressures.
can anyone assist with some hypothetical data on lighter cast bullets 300-350 grains(any bullet type) with unique, win-231 and Universal to about 900fps from 4-5 inch barrel. Wondering about charge weights and pressures.
If you can't find data for Unique with that boolit, it is usually because it is not recommended or it is unsafe. All of those are likely to be too fast for that much boolit weight but hey I could be wrong, JS...
Got a .22 .30 .32 .357 .38 .40 .41 .44 .45 .480 or .500 S&W cylinder that needs throats honed? 9mm, 10mm/40S&W, 45 ACP pistol barrel that won't "plunk" your handloads? 480 Ruger or 475 Linebaugh cylinder that needs the "step" reamed to 6° 30min chamfer? Click here to send me a PM You can also find me on Facebook Click Here.
For the Lee 476-325 bullet, roughly 9½ to 10 grains with any of the three powders. Start low and seat the bullet as deeply as possible to limit the powder space under the bullet.
You don't need QL to know 231 is somewhat faster than Unique or Universal, and will come up to higher peak pressure for a set velocity compared with those two powders. Case fill rate is slightly lower as well. Hardly a dang bit of difference between Unique and Universal, but probably Unique will match Universal for velocity at a lower peak pressure, but we're only talking a narrow range here. Charge weights for all three are probably really similar.
BP | Bronze Point | IMR | Improved Military Rifle | PTD | Pointed |
BR | Bench Rest | M | Magnum | RN | Round Nose |
BT | Boat Tail | PL | Power-Lokt | SP | Soft Point |
C | Compressed Charge | PR | Primer | SPCL | Soft Point "Core-Lokt" |
HP | Hollow Point | PSPCL | Pointed Soft Point "Core Lokt" | C.O.L. | Cartridge Overall Length |
PSP | Pointed Soft Point | Spz | Spitzer Point | SBT | Spitzer Boat Tail |
LRN | Lead Round Nose | LWC | Lead Wad Cutter | LSWC | Lead Semi Wad Cutter |
GC | Gas Check |