Chamber for .357 bullets
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Topic: Chamber for .357 bullets (Read 739 times))
PeruvianHunter
Plinker
Posts: 187
Real Name: Jeremy
Chamber for .357 bullets
«
on:
May 17, 2017, 05:54:55 PM »
Hi there
I'm new to this bigbore world so I need your help with the design of the bullet chamber for my 357 barrel.
My barrel has just arrived today. It only has 1/2in OD (.348 bore/.357 groove, 6 groove) so I plan to use a brass thimble for the bullet chamber. I'll use a thimble 'cause I don't like the idea of having to make an internal o'ring groove in such thin walls. This is a drawing of what I'm thinking:
As you can see the bullet chamber is ~.360 and the space for the bullet right after the T-port is about ~0.47 (11.94nn) and the lead is about ~.146in (2 degrees).
Are those numbers correct?
I'm taking the advice of Bob Sterne and I'll go for the Accurate Mold (36-109A-D) to cast my own bullets (.358 diameter as cast) and I'll resize the bullets to .357.
Those bullets are .45 width and 109gr (fits inside of my Evanix Mag)
Thanks
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All Springer/NP/PCP Air Gun Discussion General
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Chamber for .357 bullets