GC's for 303 (312) boolit?

[Old Iron Sights]

I searched a couple different times but didn't find what I was looking for. Ordering casting equipment for my mosin nagants. Going with Lee 312 mold and sizer die. Would I have to use the 8mm gas checks? 30 cal GC's too small?

[curator]

Standard .30 caliber checks are right for bullets under .318 diameter unless you have a custom mould made for larger ones.

[tjones]

Sagesoutdoors.com, gunbroker.com has a freechex III in .303 Br
tj

[Pigslayer]

I have a custom mold for my Mosin from accurate molds & Sage's .303 checks work well but they did not work on the LEE .312 mold . . . too loose.

[Old Iron Sights]

I was looking at the lee 312 mold and hornady gc. I may hold out for a 314 die so it's probably 30 cal gc's for me.

[JeffinNZ]

.312 is usually on the small side for .303 Brit to begin with. Sage makes his .303 checks to my specs ex a FC III device. Surprised to hear they don't stay on a Lee shank though.

[Old Iron Sights]

Kinda thinking the 312 is too small also. Wonder why lee doesn't make a proper size for 91/30s? Guess i'll save a few more beans and look for a diff mold.

[Blammer]

Old Iron, 30cal GC's are what you need.

[Pigslayer]

Kinda thinking the 312 is too small also. Wonder why lee doesn't make a proper size for 91/30s? Guess i'll save a few more beans and look for a diff mold.

I originally bought the .312 LEE for my Mosin thinking it would work. At it's best it threw a bullet a hair over .312. My bore slugged at .313 so I needed a .314 bullet. I ordered my mold from Accurate at .316. Plenty of room to size.

[Sagebrush7]

I originally bought the .312 LEE for my Mosin thinking it would work. At it's best it threw a bullet a hair over .312. My bore slugged at .313 so I needed a .314 bullet. I ordered my mold from Accurate at .316. Plenty of room to size.

What is the shank size on your .316 Accurate mold or bullet. If it is .297 I can fix you up!

[Pigslayer]

What is the shank size on your .316 Accurate mold or bullet. If it is .297 I can fix you up!

You already did. I'm using your .303 check on my 200GR Accurate mold for my Mosin. Sized from .316 to .314 on a LEE push thru then tumble lubed.

[tjones]

Likely .283 to .285 shank.
tj

[Pigslayer]

Likely .283 to .285 shank.
tj


Yep, .284 shank

[Sagebrush7]

You already did. I'm using your .303 check on my 200GR Accurate mold for my Mosin. Sized from .316 to .314 on a LEE push thru then tumble lubed.

Didn't type what I was thinking! What is the shank size of the Lee .303 molds?

[afish4570]

I originally bought the .312 LEE for my Mosin thinking it would work. At it's best it threw a bullet a hair over .312. My bore slugged at .313 so I needed a .314 bullet. I ordered my mold from Accurate at .316. Plenty of room to size.
Been using the standard 30 cal. Lyman or Hornady brand for years. Work fine on my mold. afish4570

[Pigslayer]

Didn't type what I was thinking! What is the shank size of the Lee .303 molds?

Oh, Oh. I threw them all back in the lead pot. I'll cast up a couple & PM you.

[Sonnypie]

Didn't type what I was thinking! What is the shank size of the Lee .303 molds?

Typically .285 +/-
Just like most 30 cal molds.

One is a .30 cal gas check. The other is a .303 Brit gas check.
Can you tell the difference? Either one fits a 30 cal cast bullet.
Once sized, either one is the sizing die diameter.

http://i1195.photobucket.com/albums/aa382/Sonnypie/Gas%20Checks/Gas%20check%20making%20project/P1160221.jpg

[Sagebrush7]

Sonnypie you make that check with the divit out of the side? Nice picture. Pigslayer said the .303 check was spinning on the Lee .303 shanks must be smaller.