The Truth about Glocks and Cast

[FergusonTO35]

Today I tried the Arsenal Molds 359-130-RF in my gen 5 19.They are sized to .358 with RCBS 80008, seated 1.070 with 3.8 grains HP-38. The gun is factory stock in every way and the rounds plunk quite easily. Accuracy is about the same as my other 9mm pistols with this load. Upon cleaning, I was pleasantly surprised to discover way less fouling than I expected. It's not uncommon for this load to leave little streaks of leading near the muzzle but there was none whatsoever. Love this pistol, best Glock has ever made!

[Hugo Stiglitz]

My Glock 49 came with conventional rifling. Shot lots and lots of cast 180 gr RCBS 38-40 WCF (.401") 180 Gr. Flat Nose, Cowboy bullet with no ill effects. Even shoot this out of my Ruger PC 40. Never really messed with cast out of my 17.

[Charlie Horse]

Glocks were meant to be used with cast boolits. Why else would they make them so easy to disassemble and clean?

[fayettefatts]

Glocks were meant to be used with cast boolits. Why else would they make them so easy to disassemble and clean?

[FergusonTO35]

My Glock 49 came with conventional rifling. Shot lots and lots of cast 180 gr RCBS 38-40 WCF (.401") 180 Gr. Flat Nose, Cowboy bullet with no ill effects. Even shoot this out of my Ruger PC 40. Never really messed with cast out of my 17.

The new Glock "Marksman" rifling is very cast friendly, at least in my gen. 5 19 and my two 42's.

[TD1886]

I have a Glock 1st generation Model 21 in 45acp that I've been shooting cast from for over 30 years with zero problems. It also is one of the more accurate 45acp's I own and shoot. I was told the real truth, beside the liability lawyers stories, about why Glock says not to shoot cast in their pistols by an industry insider. I'm not going into it here, but can tell you it has something to do with the barrel construction. I've had many other firearms that have had either hexagonal or polygonal rifling and shot cast from them for many decades with zero problems.

[FergusonTO35]

For the original poly style barrels in my gen. 4 19 and 26 I use aftermarket tubes.

[TD1886]

For the original poly style barrels in my gen. 4 19 and 26 I use aftermarket tubes.

I my opinion, and not to offend you, wasted effort.

[Kyle M.]

Well I’ve owned about 15 Glocks in the past 11 years. I have fired thousands of plated and powder coated bullets without issue. I had a G22 that would shoot plain lead tumble lubed with LLA with zero leading.

[FergusonTO35]

I my opinion, and not to offend you, wasted effort.

It's all good. I just find the 1:16 twist works better with my boolits and loads.

[Petander]

A brand new Glock 19 Gen 5 MOS here.

Mihec 153 grn BB NLG shoots completely clean, I have 300 rounds out of the gun now without any cleaning. VV N340 , sized .356 after PC. Subsonic velocity. I have loaded this for a Tanfoglio Limited for years. Glad to see the same works for Glock. Absolutely clean barrels both. Normal accuracy,whatever that means.