Hi guy's yesterday i picked up my first custom rifle same as the original post tac 338 action but i went a 27" lilja barrel,i started prepping some brass and loading some rounds but i have found the bolt is hard to close it feels like the extractor is having a hard time clipping over the rim of the case and chewing the rim of the case,have any of you guys come across the same thing or could u suggest what it might be.
SHRT, You may have other problems; however, I would put my money on an overly slick chamber. I have had a couple of customs that displayed the symtoms that you describe. As it turned out they simply had chambers that were polished so well that the cases could not grip the chamber walls during the pressure cycle. This allowed the bolt face to absorb the brunt of the rearward forces causing brass to flow into the ejector slots. This can occur with mild loads in highly polished chambers.
I am certainly no expert, learning myself. I would take a hard look at the boltface. My TAC 388 uses a PT&G bolt. Most of my problems stemmed from burrs on the ejector hole and also from burrs under the extractor. When I removed the extractor from the bolt, I noticed a pretty good sized burr sticking up towards the boltface.
I had assumed a custom action would have been accurized. I assumed incorrectly! Nathan dagley did a Phoenix action for a different rifle for me. I hear he sometimes recuts the boltfaces on the PT&G bolts along with other things to get a precision action. Nathan knows these actions inside and out.
Thanks for the heads up. A polished chamber may have contributed to what I was seeing.
I cleaned up the burrs on the boltface and I do not have any marks on my cases. Easy bolt lift as well. I shot yesterday and after a couple hundred rounds, my velocity increased from 2725average to 2745 average.
Still have excessive headspace but if I control my reloading process, it should be fine.