TomJ
Contributing Member
I recently picked up a 7 round 357 GP100. The first 7 rounds I fired were from Armscor. I had a difficult time ejecting the spent brass. I then tried WWB and Federal and had similar issues. I've used ammo from the same boxes in my SP101 and Model 66 with no issues. I spoke with Ruger's customer service and their rep was telling me that the Armscor ammo, being foreign made, has brass that's coated and when fired that coating sticks to the cylinders, causing this problem. When asked why it doesn't occur with the two other guns he said the tolerances on the GP100 are tighter. I've never heard of this before and am wondering if anyone else has run into this problem.