Rechambering an XP from .221 to .223

[benenglish]

I'm looking for a low-recoil, flat-shooting option for an UASHS gun that might occasionally be used for full-size targets (where I know the rams aren't particularly obstinate). I'd like to use one heavy-bullet load across the course so as to simplify the entire process.

I've done lots of shooting with various XPs in the original Fireball chambering. I've never been able to get anything longer than a 63-grain flat-base round-nose bullet to stabilize.

I'm considering an online purchase of an XP with the original .221 barrel that has been re-chambered to .223. I figure that the higher speeds will enable me to stabilize longer bullets, though I'm not sure how long. The potential seller says he's successfully used 75-grain BTHPs with good accuracy but I'm a bit dubious.

I know the smart move would be to study all the options, laboriously gather the parts over time, and contract a smith to build the gun from scratch with a fast-twist barrel. However, there's a certain convenience factor involved here in just sending off a check and being able to shoot a week later.

Any thoughts? Specifically, does anybody have any experience with .221-to-.223 re-chambers? How did it work out? Especially, how did it work with longer, heavier bullets?

TIA for any help.

[wheelgun7360]

welcome to the forum. the 223 with more speed as you call it will tear up the targets at most ranges. the 75 grain bullet you talked about will leave most rams standing unless you load it at top velocity. that's where the target damage comes into play. i know several people that use a 223 for big bore and heavy bullets at less than 2400 fps. why not rebarrel the xp to 6.5 or 7tcu. recoil is light and the rams will go down. allen

[braud357]

FYI - my factory XP in 223 would not stabilize any bullet heavier that 62 grains. I do not think that you would achieve the results you desire with a rechamber. Now, if you want to rebarrel to a fast-twist 223 - that may work.

[benenglish]

I've decided I'm unwilling to risk it. Thanks for helping me resist the temptation to take the easy (and most likely disappointing) way out.