.17 HMR 10-22

[imschur]

Anyone here have experience with one of these? Is it simply a barrel change on a .22 mag 10-22?

[Microgunner]

You also have to change the recoil spring and add mass to the bolt in the form of a heavier bolt handle. Timing is critical with this very snappy caliber and you need to slow the bolt to insure no OOB ignition which can result in a ruptured case. Which in turn can result in a magazine going KABOOM. If the bolt begins to open too fast (which it would with just a barrel change) you will expose unsupported brass while the bore is still under pressure. Approach these conversions carefully. It's best to buy a complete kit from one provider to insure properly matching parts.

[asmurff]

So for us laymen is there a drop-in kit we can do, or is this gunsmith stuff.

[Microgunner]

This round is so volatile in semi-autos it prompted Remington to issue this warning.

http://www.remington.com/safety/17_HMR_Ammo_notice/default.asp

[imschur]

holy cow