Handi Rifle, SB1 vs SB2

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IMG_1427.JPG i've looked at graybeard, and I'm sure they know, but I can't find it.

How can I distinguish between an SB1 (low pressure only) and an SB2 receiver?

From a random source the tang on the SB2 is "skeletonized"

Pic shows a solid tang on a receiver that I know to be an SB1 because it has a 357, 44, shotgun only roll mark. The other is unmarked.

What does the crowd say, other than buy a Contender.

Thanks
Jim

EDIT- the upper receiver in the pic is an SB2, the lower receiver is an SB1. SB1 is low pressure only, ie shotgun, rim fire, and 357mag.
 
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I've got an SB2 in 357 Maximum I could pop apart to compare.

Lots of 357 barrels were marked sb2 and then installed on SB1 receivers. Seems like maybe they had good intentions, but then the bean counters stepped in.
 
Lots of 357 barrels were marked sb2 and then installed on SB1 receivers. Seems like maybe they had good intentions, but then the bean counters stepped in.

Honestly after I posted that I'm not sure what it is. I know it is one of the few factory chambered for 357 Maximum and it has iron sights. It took me a while to find it. I'll try to get it out tomorrow and check.
 
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Honestly after I posted that I'm not sure what it is. I know it is one of the few factory chambered for 357 Maximum and it has iron sights. It took me a while to find it. I'll try to get it out tomorrow and check.
My bad, 357max will probably be on an SB2 frame.
 
I'd curious as to whats going on? What's it for?
I have several barrels and several receivers, just want to be certain that I know how to distinguish the receivers as it is unsafe to fire certain calibers with certain receivers.
 
I have several barrels and several receivers, just want to be certain that I know how to distinguish the receivers as it is unsafe to fire certain calibers with certain receivers.
Cool. Would my shotgun receiver work with other barrels? Like 30-30 or 223?
 
Cool. Would my shotgun receiver work with other barrels? Like 30-30 or 223?
The shotguns use the weaker receiver, you shouldn’t use it with high pressure calibers.
 
I got two different answers.

You got two complimenting answers. The answer is yes, you can fit different barrels in differ calibers to your receiver. However you need to know which receiver you have because there are two versions. One version will not handle the higher pressures of some rifle rounds and the other will. If you've got a 12ga now and want to fit a 22 to it, no problem. If you've got a 12ga now and want to fit a 45-70 to it, you're going to want to make sure the receiver you have will handle load.
This thread is actually trying to sort out how to ID the different receivers.
 
Check out her backside....

View attachment 24308
Perfect, nice backside shot! So the solid webbing is the low pressure receiver and the cutout is the high pressure. Thanks much!

I got two different answers.
To determine which receiver you have first look at the side, if it is marked for shotgun, rim fire and 357mag only then it is an SB1, ie low pressure. If it is not so marked, you must remove the buttstock, if the receiver socket for the buttstock looks like the top receiver in the first post then it is an SB2, if it looks like the lower receiver in the first post then it is an SB1.
 
HIJACK!

Where does one get different barrels? I've looked around online and can't seem to find a source.
 
HIJACK!

Where does one get different barrels? I've looked around online and can't seem to find a source.

No longer being made.

I’m thinking about selling a couple that I just bought, what calibers are you considering?

Also know that barrels often need to be fit to a frame. This involves adding or removing material one section of the doohickey on the barrel.
 
Perfect, nice backside shot! So the solid webbing is the low pressure receiver and the cutout is the high pressure. Thanks much!


To determine which receiver you have first look at the side, if it is marked for shotgun, rim fire and 357mag only then it is an SB1, ie low pressure. If it is not so marked, you must remove the buttstock, if the receiver socket for the buttstock looks like the top receiver in the first post then it is an SB2, if it looks like the lower receiver in the first post then it is an SB1.
Mine is a older circa 1995 NEF.
 
I would expect the solid one to be the stronger. I wonder if it can be strengthened.

I expect that you could drill a few holes to provide stress relief, heat treat, and refinish, but it’d be cheaper to buy one that was factory heat treated.
 
I expect that you could drill a few holes to provide stress relief, heat treat, and refinish, but it’d be cheaper to buy one that was factory heat treated.
At that point, Thompson's bolt actions sure look more attractive.
 
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