To the best of my knowledge all semi 17 HMR's are discontinued and most ammo manufacturers warn about using their ammo in semi's. Phil.
So any idea what was the problem with a 17HMR in semi.
Blow backs may not be suitable for bottle neck cartridges. A lock-up may be required.
Blow backs may not be suitable for bottle neck cartridges. A lock-up may be required.
The FN P90 is bottleneck, and the five seven pistol. Both are blowback, albiet not rimfire.
the hmr and hm2 have failed due to thin cases. I understand that certain batches were built with a strong enough case, however most are built cheaper and with the thinner case. I have a converted 10/22 that now shoots hm2. no problems to date.