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Author Topic: SB1 frame  (Read 492 times)

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Offline zeek

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SB1 frame
« on: June 09, 2013, 05:17:25 PM »
Willa SB1 frame stand up to a 357 Maxium pressure or do I need a SB2 frame?
I have 410 shotgun that I would like to rebarrel and I know that a 357 mag is ok on the shotgun frame but not sure about the maxium. First two letters on the frame are AM.
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Offline YRUpunting?

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Re: SB1 frame
« Reply #1 on: June 09, 2013, 05:41:45 PM »
Yes, the SB1 is fine.  Both my Maxi's are on SB1's.  My first one started as a 410 then I sent in for a 357 barrel and reamed it.  Check the FAQ, it's all documented.  You could have an issue with the large firing pin, but you won't know until you shoot it.  I use small rifle primers and I haven't had any issues.

Finding 357 Maximum brass should be your biggest concern.  And read the link below, especially "Developing a Load".

http://357maximum.com/

Good luck!  :)

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Offline cudatruck

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Re: SB1 frame
« Reply #2 on: June 09, 2013, 07:38:48 PM »
The large firing pin on our shotgun frame was very much a problem. Factory fitted .357 barrel would flow primer metal back around the firing pin with FACTORY loaded ammo in 38 special and .357 mag. If I downloaded .357 cases to 38 special light loads it was ok. Maximum brass had to download to light 357 mag charges and then it was ok. Put the barrel on a frame with small firing pin and now we can go WAY up on the charges with no problems.
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