Apparantly my Miroku/Win 1886 has no throat - only a short .132 or so from the case mouth to direct land engagement.
All loaded on a Lee Loader (hammer time).
Boolit #1, Lyman 457122, 3ww/1pb alloy. Sized .457, Seated to crimp groove. COAL 2.555. This feeds slicker than snot and is my "go to" load. Dia in front of front driving band (length .060?) is .445.
Boolit #2, LBT .458 450 LFNGC, heat treated WW, sized .459. Seated to crimp groove. Pre chambering COAL 2.48 post chambering COAL 2.4695. Note the Land Engagement at 2.29. Dia here is .455. Point of land engagement is .13x (+/-) from case mouth.
Boolit #3, 600gr .459 LBT. Quenched WW, Sized to .457 (PITA). No crimp groove. Pre chambering COAL 2.555. Post chambering COAL 2.528, Again, land engagement dia .455.
Boolit #4 is the same boolit, but it actually almost pulled from the case on extraction.
When I load a 405gr Rainier TCFMJ out to 2.555 and chamber it, it seats itself to 2.423 on loading... tight to the lands.
Glad I only loaded up a couple of rounds to test-chamber...
SO, if I run the Program to make a BTAN of .445 and a nose of .445 with a band dia of .459 will I be able to seat to the crimp groove and get a COAL of 2.550" without engaging the lands
? (Nominal case length 2.105 + .445 = 2.550, max OAL 2.555....)