Bullets remained 168 SMK across the board;jeffdorr said:Did you change bullet brands, or types? Different bullets may have different ogive lengths , where the bullet actually touches the rifling lands first.
Your chamber may also be fouled from light loads that don't seal out burnt powder.
Do your bullets extract with difficulty, or do they just load hard?
Do you load with the same die every time (stupid question, but one never knows)?
Have you compared your bullet to a factory load?
I started shooting yesterday with a clean barrel. My first load down range was 42.0 gr of IMR 4064. Would that be considered a light enough load to foul the chamber?
All fired cartridges extracted with ease;
The cartridges loaded with H4895 were loaded using a Lee full length sizing die, Lee bullet seating die, and a Lee factory crimp die...The cartridges that gave me a hard time closing the bolt (the ones loaded with IMR 4064) were loaded with a Hornady full length sizing die, Hornady bullet seating die, and a Lee factory crimp die.
Compared to a factory load, they look the same, but I'm going to MIC them after work.