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I have in interesting issue with my tupperware 20c. After shooting roughly 50 rounds with factory new jacketed ammo the gun's accuracy turns from .5 inch groups to 50% on the paper at 25 yards. I examined the barrel to find two lines following the ports which are inline with the rifling. The lines appear to be a strong mixture of copper and some powder. From what I can tell one of two things is happening. 1) The air vents are cooling the exposed portion of the bullet resulting in a deposit of copper on the barrel which builds up to cause inaccuracy. or 2) the port holes are burred which results in a buildup of copper and inaccuracy. The gun is roughly 1 year old, 1,000-1,500 rounds and has had a 20lb wolf spring, steel guide rod and ghost trigger installed, though the issue existed before they were installed. Thoughts?
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Co-Founder of the Contra Costa Contras shooting team -
hmmm contact glock send the barrel they will send you another one.
Weird I have never heard of that one before but yeah sounds like a build up.
Do you ever get blown primers? Are you running it hot?There are sniper everywhere and nowhere.....who knows what is out there.
PUREMMA
MIXED MARTIAL ARTS ACADEMY -
Never had a blown primer. I dont run it hot due to the whole lack of fully supported chamber. I load about 6.5gr of unique generally which without my chrono book with me Im guessing gives 950-1100 ft/sec on a 180gr. However I do have a fun Power Pistol load I make for a friend of mine's LW6 barrel that pushes a 180gr 1400 or so with no case deformity after 8 loads or so.
If I send them the barrel Im thinking they will send a different SN on it. That sucks as I have sequential #ed G20s...Co-Founder of the Contra Costa Contras shooting teamComment
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