Had go in the library & look this up, found it in Hatcher`s Notebook & I took this picture, it of a Savage No4.........
Had go in the library & look this up, found it in Hatcher`s Notebook & I took this picture, it of a Savage No4.........
for odd numbers of grooves i have found that just wrapping something around the slug,and subtracting double it's thickness gives me a very close measurement to what i need.
measuring the minor [groove] measurement is more difficult and i haven't worked anything out fot it,,except a little trial and error on the nose.
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 |