I built a 737R 6 Dasher a few months ago and got everything pretty close to where I want it. I took it out to a prairie dog shoot over the last week and experienced my rounds sticking into the rifling after about 100 rounds. A cartridge closed into battery slightly hard which prompted me to eject it, when I did it ejected hard and pulled the case out without the bullet.
I'm about .010" off the lands according to the old school method of finding the lands via the feel of an ejector-less bolt. I started with .015" and experienced more consistent muzzle velocities at .010" and stopped there. Before my trip I shot pretty extensively without seeing any issues. I'm loading off a Dillon XL750 and the dies are on a dedicated tool head. I use the same shell holder slot to seat all my rounds. I'm using Redding type S with a micrometer seating die.
Before my trip I went out and shot 50 rounds at the range and did not clean it. About a week later was day 1 of my shoot and I shot about 50 rounds and experienced my first stuck round. I unstuck the round (very easily) with my cleaning rod and cleaned the rifle. Cartridges were entering into battery and ejected without a problem. The next day I shot about 100 without a single issue and then it popped up again. This time I unstuck the round and cleaned the powder out and put another round in with the same result. I cleared the bullet and have not cleaned it in case the community here suggests I take a look at something.
Is this carbon ring buildup or something else? Should I back off and increase my land jump?
I'm about .010" off the lands according to the old school method of finding the lands via the feel of an ejector-less bolt. I started with .015" and experienced more consistent muzzle velocities at .010" and stopped there. Before my trip I shot pretty extensively without seeing any issues. I'm loading off a Dillon XL750 and the dies are on a dedicated tool head. I use the same shell holder slot to seat all my rounds. I'm using Redding type S with a micrometer seating die.
Before my trip I went out and shot 50 rounds at the range and did not clean it. About a week later was day 1 of my shoot and I shot about 50 rounds and experienced my first stuck round. I unstuck the round (very easily) with my cleaning rod and cleaned the rifle. Cartridges were entering into battery and ejected without a problem. The next day I shot about 100 without a single issue and then it popped up again. This time I unstuck the round and cleaned the powder out and put another round in with the same result. I cleared the bullet and have not cleaned it in case the community here suggests I take a look at something.
Is this carbon ring buildup or something else? Should I back off and increase my land jump?
