Win 1886 Throat vs Boolits...

[Old Ironsights]

Arrgh

Looky this:

http://i5.photobucket.com/albums/y180/MrMisanthrope/IMG_5514-1.jpg

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 (.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, Axeman's 600gr LBT. Quenched WW, Sized .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.

So that's what, a throat of .132 or thereabouts?

Is it normal for the 1886 to have that short of a throat?

Glad I only loaded up a couple of rounds to test-chamber...

[KirkD]

OI, I had one .... it's got almost no throat. I posted a few more details on leverguns. With the exception of the bullet on the left, those others are too fat for the Win/Miroku '86 unless you seat them real deep.

[Old Ironsights]

Since the lands are engaging at roughly .455, How about a .445 or .450 Bore Rider...

http://i5.photobucket.com/albums/y180/MrMisanthrope/450grborerider.jpg

This is a 450gr that would let me have a COAL of 2.550... assuming the bore rider option works.

[Firebird]

All of the Miroku guns I have heard of had no throat at all, the rifling lands just end with no taper. This is the condition of my takedown 1886 when I first bought it new. You can take them to a gunsmith and have a proper throat cut.

[Old Ironsights]

Anybody have experience with Bore Riders? Would this work?

You can see here how much shorter the nose is on the heavier non-stepped bullets. I really am thinking having a stepped Bore Rider is the only solution short of reaming. (note how the LLA caught on the step):
http://i5.photobucket.com/albums/y180/MrMisanthrope/IMG_5515-1.jpg
Since a Gould is a .450 Nose Length BTAN, .445 Step, no GC, 50% meplat, Here's the latest thoughts:

..............Gould ...............................Gould 450 GC ......................Gould 450 GC 75%meplat

http://i5.photobucket.com/albums/y180/MrMisanthrope/gould.jpghttp://i5.photobucket.com/albums/y180/MrMisanthrope/gould450.jpghttp://i5.photobucket.com/albums/y180/MrMisanthrope/gould45075meplat.jpg

I shortened the nose length to .445 to add a little fudge factor, but... the biggest question there would be is whether or not the meplat would hang when lifted, because it looks like it would otherwise chamber the same way as the Gould, and move a lot of the weight forward... opening up case volume over deep-seating non-bore-riders...