Rim Dimensions (45-75) ... Various Cartridges

[john boy]

Rim Dimensions
Thickness  Diameter Brand
062          602        348 Resized
057          613        Jamison/TenX (not Bertram)
057          605        Buffalo Arms
056          621        Originals - WRA, Eley and No Headstamp (era 1880's)

[Hoof Hearted]

John Boy

Quick questions:

"Buffalo Arms" I have bought from them in the past. They sold either Jamison or "reformed" Wincheter .348..........do you have some with THEIR NAME on the headstamp? Or just some that is Winchester that may have been thinned?

When you say original, how did you measure these? On all of the old (balloon head) cases I have seen the have a convex head shape (meaning the outer rim would be thinner that near the primer pocket).

Not meaning any disrespect just trying to wrap my head around this

Thanks!

[john boy]

When you say original, how did you measure these?

HH - measure the full rim thickness

do you have some with THEIR NAME on the headstamp?

No and don't intend to buy any either

[Sir Charles deMouton-Black]

HH;  I think the question was ,how do you measure rim thickness?  I'd use the little "thingie" that sticks out the other end a my gallopers.  Case pressed down on a hard surface, end of the calipers on top 'o the rim, and get the thingie to stick out onta tha said hard surface.  There, Robert's yer fathers brother! 

[Hoof Hearted]

HH - measure the full rim thickness
No and don't intend to buy any either

Whoa!
Did I piss you off?

[w44wcf]

I measured the rims on two original .45-75 ctgs. that I have. Because the rims have a slight radius on the outer edge, to get a more accurate measurement I first measured the o.a.l. of the case. Then I measured the distance from the case mouth to the forward portion of the rim and subracted the two dimensions. This is what I came up with.

W.R.A. CO.  .060"
S  UMC  H  .061" 
(S H means Solid Head)

w44wcf

[Hoof Hearted]

Rim Dimensions
Thickness  Diameter Brand
062          602        348 Resized
057          613        Jamison/TenX (not Bertram)
057          605        Buffalo Arms
056          621        Originals - WRA, Eley and No Headstamp (era 1880's)

Here is a link to the only brass available (at the present) from Buffalo Arms:
http://www.buffaloarms.com/browse.cfm/4,435.htm

If anyone has any info regarding whether or not they are "reducing" the rim thickness in some way on these formed cases please post it!

Thanks

[john boy]

Did I p*** you off?

HH ... Heck No, Sorry you interrupted the post that way

[Hobie]

Mine did not have any changes to rim thickness.  My SRC does not require it.