77 gr of powder under a grease groove boolit seems rather stiff to me in the .45-70 case. Have you tried 70 gr, or 67 gr, on the target, rather than the chronograph?
That Ideal 457125 should shoot ten inches or under at 500 yards out of your rifle.
77 gr of powder under a grease groove boolit seems rather stiff to me in the .45-70 case. Have you tried 70 gr, or 67 gr, on the target, rather than the chronograph?
That Ideal 457125 should shoot ten inches or under at 500 yards out of your rifle.
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 |