10MM Velocity Comparison-(3) Guns- 4 different barrel .

[Jim Bridger]

Great information reloading the 10 MM. I have 10, 10MM pistol to feed.

[cphills]

Hey Guys,
What's your experience/opinion on the polymer coated bullets that seem to have become available in the last few months. Better than plated for handloads? Accuracy comparisons?

[sqlbullet]

Like lead, poly coated bullets will reach max velocity (pressure) using less powder than comparable jacketed/plated bullets.  This is because lead or lead/poly bullets will seal the bore better resulting in less parasitic pressure loss.

[gnappi]

I've been powder coating my .357 sig, .40/10mm and .45 bullets for nearly a year now. I have not shot a lot due (maybe 100-150 rds per week) conserving components with COVID supply induced issues and I have not chronographed them. But, those I've shot using mid to upper mid level load data for jacketed bullets I've not seen any signs of pressure in my oft reloaded cases outside of normal splitting attrition from age.

The bore and guns stay much cleaner than when I used to use waxy (VERY smoky) lube, and there's no copper fouling in the bore to deal with either. Smoke on the range is nearly gone and what's there is 100% due to powder burning. Also the bad taste in my mouth from lube is gone.

As far as comparing plated / jacketed / coated accuracy, I really can't say, nor do I care. I don't "target" shoot, I generally train and shoot the majority of my range time at under 30 feet, from a holster and left ventricle / right ventricle is what I easily get with my PC'd bullets.

Back in the day we used to have a 10 bowling pin match at 75 feet, if I were to do any of that type of shooting again, I'd pay more attention to accuracy.

As it is, I can't see myself buying TMJ/plated or FMJ bullets ever again. With two 20 pound furnaces, four 6 cavity molds, and three ovens I can make a whole lot of bullets in a few hours.