FN Mk20 in 6.5CM. 2nd time out with it today.
First time we shot about 50 rounds of factory Spark 142g SMK in about the same temperature. I had 1 case with a pierced primer and the rest had some sort of ejector swipe on the Peterson brass but nothing you wouldn't see with a SASS and M118LR.
Good accuracy, consistent hits at 900+, S/D was like 4.
Go out today and after 3 rounds, I get a click when pulling the trigger. Charge it, ejects a live round with no primer strike. Pull trigger again, click. Eject another round with no primer strike.
I pull the gun apart, firing pin looks fine. Reassemble, fires again without a problem. We shoot another 5 rounds and I can smell gas and gunpowder. Check the cases, 3 of the 5 have completely pierced primers. Temp is like 5 degrees from what it was last time, and still in the 50s, so definitely not hot.
Since this is the only ammo I've ever shot with this, I can only assume that this is all ammo related and the ammo is pushing the border of blowing the fucking gun up. On the other hand, WTF factory ammo does this, especially at 50 degrees? I get that its a semi and they generally are a little different from loads for bolt guns, but that is generally for cycling, not almost blowing the gun up. Had I tried this in 90+ degrees, I'm betting we would have had a bad outcome.
Has anyone had an issue with Spark ammo just being like this?
First time we shot about 50 rounds of factory Spark 142g SMK in about the same temperature. I had 1 case with a pierced primer and the rest had some sort of ejector swipe on the Peterson brass but nothing you wouldn't see with a SASS and M118LR.
Good accuracy, consistent hits at 900+, S/D was like 4.
Go out today and after 3 rounds, I get a click when pulling the trigger. Charge it, ejects a live round with no primer strike. Pull trigger again, click. Eject another round with no primer strike.
I pull the gun apart, firing pin looks fine. Reassemble, fires again without a problem. We shoot another 5 rounds and I can smell gas and gunpowder. Check the cases, 3 of the 5 have completely pierced primers. Temp is like 5 degrees from what it was last time, and still in the 50s, so definitely not hot.
Since this is the only ammo I've ever shot with this, I can only assume that this is all ammo related and the ammo is pushing the border of blowing the fucking gun up. On the other hand, WTF factory ammo does this, especially at 50 degrees? I get that its a semi and they generally are a little different from loads for bolt guns, but that is generally for cycling, not almost blowing the gun up. Had I tried this in 90+ degrees, I'm betting we would have had a bad outcome.
Has anyone had an issue with Spark ammo just being like this?
Course he had it bundled with a cerakoted SR25 lower.
