rcbs specialty mold id

[loiner1965]

226150
waiting for arrival but not sure what it is for ?
rcbs think its a 50 / 70 winchester mold but they not too sure either lol

[Tatume]

It should make nice, relatively light bullets for the 500 S&W (0.500" groove). They would be undersized for the 50-70 cartridge (0.515" groove). The SWC design would be unusual for a paper-patched bullet.

[loiner1965]

many thanks for you reply
should be here soon so i will cast some and see what it produces lol

[rwadley]

It is the right diameter for a 505 Gibbs, but really light weight (and SWC).

[rockrat]

Its for the 50AE IIRC

[loiner1965]

arrived and casted 2 samples and they measured .504 and 360 gns each give or take 1/10 gn

[barkerwc4362]

Sounds about right. A lot of the RCBS molds are spec'ed for linotype. So they cast a little undersized and about 10% heavy.

Bill