increase in pressure signs with same load?

Idaho Sawyer

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Joined
Dec 15, 2009
Messages
326
Location
Lake Fork, ID
Got the new Kreiger broke in and did an initial pressure test increasing from 97-103 grs. of RL 33. Saw slight ejector marks at 103 and a node at 101. The gun in shooting lights out, good es, easy bolt lift and no pressure signs. Fast forward to the past few 2 shooting sessions, I have seen ejector marks showing up and this morning fired twice, ejector marks and heavy bolt lift on 1st round, 2nd round struck 1 moa higher than my normal dope and HEAVY bolt lift. these are the details
-338 EDGE, trued Remmy, 101 gr rl33, CCI 250, berger 300's, Nosler Brass
-this is the 3rd round of firings on the brass (shots 101 and 102 from this AM are the only ones fired on the 3rd round)
-102 rounds the tube, intial barrel break in cleaning and then cleaned at round 75, I always use Bore Tec Eliminator
-Same lot of powder, bullets and primers
-shooting conditions have been within 35-55 degrees during every outing
I did a search and I am going to aggressively clean it tonight (maybe carbon/copper build up)?? Other than that any thoughts would be greatly appreciated. thanks, Brent
 
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