6.5x55ai wrote:You say you decock your bolt - what is your impression of the force required to recock it?
I have to use the special tool supplied by Maddco to uncock and recock, if spring was degraded too much, this would be possible to do by hand.
6.5x55ai wrote:You say that you are on a new batch of primers - was there any issues with the previous ones? Were they CCI 200s as well?
I didn't have enough of the previous batch to complete the 125 rounds required for the competition. The previous batch were CCI 200's but from the old look box. I buy primers by the 5000 carton. There were no issues with the old primers
6.5x55ai wrote:For a start check your firing pin protrusion, IIRC should be around 50 - 60 thou. (Others will correct me). How deep are your primer pockets? How deep are your primers ending up being seated? What do your primers in depth measure - I generaaly find the ones I use canaverage128 thou ish.
Yet to check FP protrusion.
All primer pockets have been uniformed, as best I can measure @ 0.132' deep
Primers vary from 0.002 to 0.005 deep, I only have vernier caliper not a depth micrometer.
Primers are about 0.128" also, but the anvil is proud of the edge of the primer cup. I am not going to risk prying the anvil out of the cup to measure the cup.
Yet to check headspace, but this is the same barrel that the previous batch of primers worked OK in.
Wal86 wrote:You say cases have been fired, but we're they fired in that chamber?
Yes all previously fired in that chamber.
Wal86 wrote:You only need .003" headspace and a projectile seated off the lands, your firing pin will just push the case forward and not make enough contact to primer..Take firing pin mechanism out of bolt body, put case in action and close bolt, if there is headspace you will be able to move the bolt body backwards and forwards..
Yet to try this, I have GO and NO GO gauges though. My recollection is that the bolt closes easily even on the fired case
johnk wrote:Lack of pin strike suggests either that the primer is too far away from the firing pin as already suggested or that you have a burr or foreign matter in the bolt that's slowing the firing pin fall. Wash & lightly oil after checking. Also worth checking is if the sear piece on the firing pin is rubbing in the action way during fall.
I will also check this when I can. My rifles are stored at a different location to where I regularly reside. Licensing branch are aware of this.
Thanks for the suggestions - Philip