Trip two miss firing

[Dubula]

Guys please help. The Saga todate. A year ago I purchased a secondhand .222 Bruno Fox. With it 40 round of Winchester ammo. Of these 15% missfired. Dent in primer looks a little shallow (but the same as those that fired). Re chambering and "firing " resulted in another fail discharge. I tried hand loads and similar problems persisted. Sent it in to the smithy to check fireing pin (clean?) and spring tention, he tried PMP (local factory ammo) - some improvement. I then made up new hand loads (after reading many of you postings) focusing on 1. consistant case length,2. clean primer pockets, 3.setting OAL with a test round (split neck and a slight back off), 4. polishing rounds after loading.

At the range I found 20% not discharging - all of these required a little more pressure to close the bolt (shiny brass wipe mark on base). A mate at the range also had his Bruno Fox and the failed rounds (6/6) fired satisfactorly from his rifle - no bolt closing effort required. It is possible that the action is not bedded properly at the front screw. Grouping is poor (100mm at 100 metres).

Any help is appreciated.

 

[Al Thompson]

South African? Welcome!

I had a Fox like yours. Good rifle. I'd re-look the firing pin and the firing pin spring for the ignition problems - someone may have clipped the spring looking for a lighter trigger pull.

As for the rounds not chambering easy, you may have a chamber problem. Only way to tell is to do a chamber cast..

 

[Dubula]

Thanks Al - Yes, South African.
I am looking for a local supplu of low melting point guu to mahe the cast, lets see what we find.