Blowback pistols more reliable?

Jaymo · Nov 14, 2014

My Makarovs and CZ82 have been as reliable as the most reliable locked breech autos I've ever owned and as accurate as my most accurate locked breech auto (excluding the S&W 52).
They've been more reliable and accurate than a lot of the locked breech autos I've owned.
They have not been less reliable than any of my locked breech autos.
The only locked breech auto I've owned that is more accurate is the 52 (for obvious reasons).
They have not had any issues. Feed, fire, extract, and eject are as good as it gets.

jim243 · Nov 15, 2014

Blow back firearms have been with us since the late 1800's early 1900's. Their reliability and accuracy has never been questioned. The fixed or semi fixed barrels account for most of their accuracy.

Mauser, Luger, Walthers, Thompson all made blow back designed guns in 9 mm as well as 45 ACP. Then you have the Mac-10, Mac-11, Uzi, M-3 in 9mm & 45 ACP, and even the H&K MP-5 & the Kriss. Of course you have the little 380's made by Colt, Rugger, S&W, Beretta, Bersa, Taurus and about a dozen others.

I'd would say the design is reliable and the guns accurate. And last of all don't let us forget Hi-Point.

Jim

Pilot · Nov 15, 2014

SlamFire1 said:
I don't think there is an easy answer to this. Low powered pistols are simple blowback but even then they have case to chamber friction issues. Blowbacks are very sensitive to breech friction, aluminum cased ammunition for use in blowbacks are coated in a wax lubricant to reduce the The Germans must have thought so. This is a P7 pistol, fixed barrel, gas delayed blowback. Notice the chamber flutes which break the friction between case and chamber through "gas lubrication". If those get gummed up the pistol won't extract.

I think the complexity of the gas system, the amount of residue left after firing, plus the squeeze cocker mechanism, are the reasons this action is no longer in the market.

The fluted chamber is there in case of an extractor failure which is very rare. The HK P7 has an extractor, so it will still extract should the flutes get "gummed up". The HK P7 is no longer produced due to COST, and the marketplace, not function. Walther is coming out with a gas delayed blowback, so the concept is still valid.

mavracer · Nov 15, 2014

All guns are designed to work and be reliable, if they are built as designed and fed good ammo from good magazines they'll work. But the more complicated a design is the harder it's going to be to hold all parts to spec. So while the design isn't more reliable it is cheaper and easier to manufacture a simple blowback action pistol and have them be reliable.

brickeyee · Nov 15, 2014

So while the design isn't more reliable it is cheaper and easier to manufacture a simple blowback action pistol and have them be reliable.

Until you get any higher then low pressure rounds.
Then they tend to fracture.

The spring has almost nothing to do with blowback operation.
It is the mass of the moving slide that does the job.

The spring is just the reloading device for the next round.

Gun Master · Nov 15, 2014

Big, Chuncky Blowbacks

What about the Astra Model 400 (1921) ?
It is a rather large pistol and has a mean kick !

brickeyee · Nov 16, 2014

I had someone show (and demonstrate) his 9 mm blwback pistol.
He was very proud of the low cost.

The muzzle blast was incredible.

When i let him fire a 1911 he 'got it.'
After less than one magazine.

David4516 · Nov 17, 2014

Gun Master,

I'd love to try an Astra pistol sometime (I already reload 9mm Largo for a Star 1911-ish clone)

Gun Master · Nov 17, 2014

Blowback Pistols

David4516 said:
Gun Master,

I'd love to try an Astra pistol sometime (I already reload 9mm Largo for a Star 1911-ish clone)

I can handle my two 1911's (.45ACP) (recoil operated), a lot easier than the blowback operated Astra Model 400 (aka Modelo 1921) 9mm Largo, but I still like to shoot it.

GM

Blowback pistols more reliable?

Jaymo

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