If you mean you want to change bolt face size all you have to change is the bolt head. You’ll have to probably reset your firing pin protrusion. I’ve swapped bolt heads on my 12FV and it’s pretty easy. You could swap complete bolts but I think you would still need to set it up for the action you’re running it in. Someone more knowledgeable than me will probably tag in shortly.
Bolt heads are pretty cheap and if you think you might want to swap back, it might be better to just set up another one. If you change the bolt head, I recommend installing the SSS Improved Ejector/Extractor Kit. It’s 20 bucks of the best money you can spend.
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