Thread: .17 Mach IV Barrel

I got into a bit of 100 yard paper work this afternoon, Im still not really set up to load for .17 cal so I need a few more tools to get all my new Lapua brass cut to length etc but I ran some fresh necked down Remington brass for the test.

First thing I noticed is that it has a long throat so bullets can be seated a long way out.

The first 5 rounds Berger 25gr Hps and 20gr VMax were seated with about 80% neck contact which meant quite a bit of jump.

Berger 25gr


V-Max 20gr


The last and best group were 25gr Bergers seated way out with only about 30%neck contact. This group measured 9.3mm ctc!



Something tells me this barrel isnt fussy, it will shoot anything. I still have some Hornady 25gr HPs and some 25gr VMax (probably my go to bullet) to test but I think Ill just load everything with about 50% neck contact.

HAPPY DAYS!