Husqvarna 4100 bolt head not grabbing cartridge base

MD

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I started having a little problem with my Husqvarna 4100 bolt head extractor not grabbing the cartridge base when I am loading the hand loaded cartridge from the magazine into the breech.

Twice this season I didn't notice it at first and then the bolt wouldn't close on the cartridge and the cartridge got stuck in the breech.

Once I had to go to a neigbouring hunt camp and beg the use of a cleaning rod to poke it out and the second time a sharp rap with the heel of my hand on the stock near the breech shook it out.

Upon examination last time I noticed that the brass was a Federal case when all my other loads are made from Dominion brass.

I must have inadvertently used a Federal case at some point.

What's my problem? It never happened last year at all.
 
First, check the rim thickness. Then the chamfer. If the bolt grabs one make and not another, it's more likely to be a case difference.
 
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