[Seth]

Very interesting. I haven’t tried the 135’s, but both the 124’s and 147’s have been flawless in my G4 G17 and G4 G34, both are essentially factory stock, except the G34 has an aftermarket trigger in it. In fact, that has been all my G34 has seen from day one. It may have had a mag or two of factory ammo, but 147’s is primarily what I’ve shot through the G34. Its my USPSA Production rig. Neither have had any FTF with the Matchwinners. Shot some last weekend as a matter of fact.

I’m running 1.140 COAL on the 147’s, with a small crimp, mainly to reduce the bell.
1.100″ on the 124’s, similar crimp as the 147’s. I’ve run them as short as 1.05″
Unfortunately, not using the same powder, I’ve been using Titegroup and HP-38.

Are you running Glock OE mags themselves, or just the followers/springs?
Still hanging up with a clean barrel?

Hope you can get it figured out!

[Seth]

I had a similar problem loading 300 blackout – was actually slightly crushing the necks and causing issues when plunking in the barrel. Took me forever to figure out. Grabbed a Lyman M die and just ever so slightly belled the case mouth to just allow it to sit nicely on the case. Biggest issue is to make sure you use a crimp die after seating to push that bell back in, or it won’t chamber correctly.

[Seth]

Yes, there is a difference.

Plated bullets start as a lead core that is submerged in a chemical bath and electroplated with copper. The copper that attaches to the lead core is very thin. The thin plating is easily damaged if used at high velocities (typically when supersonic) or if crimped too tightly etc. They are usually cheaper than a standard jacketed bullet, however.

Jacketed bullets have a thicker, copper cup made and the lead core is encased in said cup/jacket. It is quite a bit thicker than plated bullets, and can withstand high velocities and is generally more durable and less susceptible to the jacket coming off or being damaged from tight crimps or in the rifling of the barrel. They are more expensive usually when compared to plated.

[Author]

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