I appreciate your thoughts and any help in advance.
I have an Sig Cross with a Factory 6.5 Creed barrel. Need opinion if I need to send it back to Sig for HS issue.
Back story- Rifle (new to me / used) shoots very well but I was experiencing some hard bolt open, cratering in primers and some shinny marks on case head (no round ejector marks) with some 6.5C ammo I had loaded for my Impact / Proof barrel combo. I thought it was the Lapua brass lower case volume but the load is not hot (41.8gr H4350 under. Hornady 147). I decided to try some different loads w/ 130 Berger Hybrids 1x fired Lapua brass from a different rifle with H4350, R26 and VV N160. Again, all mid-range powder charges. Same result. I was jumping the bullets .075 so tried some with .025 jump and had same result.
I had some factory Remington 140gr Core-Lokt ammo and it chambered fine and the bolt opened normally. I then measured the Remington brass I had fired with a Hornady Headspace Gauge and it was 1.530. I measured a piece of new Rem brass / anmmo and it was 1.529.5. As a comparison, I checked my Lapua brass from my Impact / Proof rifle and fired brass measured 1.532. I had bumped the shoulder of the Lapua brass .002 to 1.530 to load it in my Sig (In hindsight this wasn’t enough as the fired brass measures 1.530 out of the sig).
A guy in the Sig Cross forum mentioned having hard bolt lift with Peterson brass. He also said his bolt would not close on a go or no go gauge. His was an aftermarket barrel, but I decided to check the HS on my Sig’s factory barrel today. Bolt closed and opened VERY hard on Forster go gauge and didn‘t close on a no go gauge. I measured my Forster go gauge with Hornady HS tool and it measures 5.131.5-5.132. With this same go gauge in my impact 6.5C the bolt closes normally.
My Sig‘s head space is to short correct?
Thanks again.
I have an Sig Cross with a Factory 6.5 Creed barrel. Need opinion if I need to send it back to Sig for HS issue.
Back story- Rifle (new to me / used) shoots very well but I was experiencing some hard bolt open, cratering in primers and some shinny marks on case head (no round ejector marks) with some 6.5C ammo I had loaded for my Impact / Proof barrel combo. I thought it was the Lapua brass lower case volume but the load is not hot (41.8gr H4350 under. Hornady 147). I decided to try some different loads w/ 130 Berger Hybrids 1x fired Lapua brass from a different rifle with H4350, R26 and VV N160. Again, all mid-range powder charges. Same result. I was jumping the bullets .075 so tried some with .025 jump and had same result.
I had some factory Remington 140gr Core-Lokt ammo and it chambered fine and the bolt opened normally. I then measured the Remington brass I had fired with a Hornady Headspace Gauge and it was 1.530. I measured a piece of new Rem brass / anmmo and it was 1.529.5. As a comparison, I checked my Lapua brass from my Impact / Proof rifle and fired brass measured 1.532. I had bumped the shoulder of the Lapua brass .002 to 1.530 to load it in my Sig (In hindsight this wasn’t enough as the fired brass measures 1.530 out of the sig).
A guy in the Sig Cross forum mentioned having hard bolt lift with Peterson brass. He also said his bolt would not close on a go or no go gauge. His was an aftermarket barrel, but I decided to check the HS on my Sig’s factory barrel today. Bolt closed and opened VERY hard on Forster go gauge and didn‘t close on a no go gauge. I measured my Forster go gauge with Hornady HS tool and it measures 5.131.5-5.132. With this same go gauge in my impact 6.5C the bolt closes normally.
My Sig‘s head space is to short correct?
Thanks again.