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Ruger 57

Posted: 02 Jan 2020, 06:02
by Fotis
So if I understand this correctly the new ruger will not have the same problem as the fn when slow powders like lil gun are used due to its delayed blow back system?????

Reports are that the pistol locks until powder is burned and projectile leaves the barrel.

Re: Ruger 57

Posted: 03 Jan 2020, 20:31
by Buffman
We won't know until reloaders start working with it.

Re: Ruger 57

Posted: 06 Jan 2020, 09:08
by panzermk2
Fotis wrote:
02 Jan 2020, 06:02
So if I understand this correctly the new ruger will not have the same problem as the fn when slow powders like lil gun are used due to its delayed blow back system?????

Reports are that the pistol locks until powder is burned and projectile leaves the barrel.

How is powders to slow for the FsN be an issue?

The delayed blow back operation of the FsN allows it to safely handle pressures higher then most rifles.


Please name one gun ever that will function with powders to slow for it?

Barrel locking has nothing to do with the burn rate of a gun powder.

Re: Ruger 57

Posted: 06 Jan 2020, 14:49
by Fotis
Jay. I tried using lil gun before I knew any better in the fn and it separated the necks from the body of the case. I was led to believe that because the action opens up too fast and the powder is not completely burned was the issue. Am I wrong? Even if I am can someone explain to me why you can't use h110 2400 or little gun in the 5-7 without any negative results

Re: Ruger 57

Posted: 06 Jan 2020, 14:55
by Fotis
Image

Re: Ruger 57

Posted: 07 Jan 2020, 10:41
by panzermk2
Fotis wrote:
06 Jan 2020, 14:49
Jay. I tried using lil gun before I knew any better in the fn and it separated the necks from the body of the case. I was led to believe that because the action opens up too fast and the powder is not completely burned was the issue. Am I wrong? Even if I am can someone explain to me why you can't use h110 2400 or little gun in the 5-7 without any negative results
Because the powder is TOO SLOW for the volume the case can hold. Just like True Blue when loaded into .556 it blows out primer, becasue it's TOO FAST. The fact is the FsN action has such a long delayed blow back that it can withstand 80k psi loads with only the brass failing.

Re: Ruger 57

Posted: 07 Jan 2020, 10:51
by panzermk2
Fotis wrote:
06 Jan 2020, 14:55
Image
Not user who created this pic and info.

That case could easily been fired from a PS90 and that would be normal neck movement. If you load a heavy for 5.7 bullet like a 50gr ballistic tip and load with with standard pressure powder charge you will get that amount of movement.

Here is the thing. I can count on one hand how many people actually understand how the 5.7 works. NONE of them work for any of the publications I have ever read. The pure BS spewed by writers applying conventional theories just need not apply.

One of the aspects of the 5.7, which is 100% totally normal, is that while under full pressure the case shoulder moves and the case "grows". This is totally normal. A conventional round like the 45acp or 9mm expands while under pressure sealing the case in the chamber. The slide only starts moving rearward when pressure has dropped in the case, The lug has to be timed to match this, hence the issue of making very short barreled 45acp 1911's to function. This is the exact opposite of the 5.7 and why somany gun scribes including the hand loading ones don't have a fucking clue what they are talking about.

Re: Ruger 57

Posted: 07 Jan 2020, 10:55
by panzermk2
In that picture, "The action unlocking"

It doesn't fucking lock, whom ever wrote that is a moron and should not be trusted with that pencil let alone 5.7 re loading.

Re: Ruger 57

Posted: 07 Jan 2020, 12:39
by Fotis
It was in a magazine and it was written by Brian Pearce. Anyway thanks for the insight