I have an old remington 510 Targetmaster .22LR, and I was wondering if I could convert it to 22 magnum. It is a bolt action single shot rifle, and a 22 mag fits in the action. However, since the shell is slightly larger, it doesnt fit in the breech. Would it be possible to drill or bore out the breech, about 1" in, to accept the slightly larger shell? The bore would still stay the same diameter, only the breech would enlarge. Anyone ever heard of anything like this?