Ruger 57

[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.

[Buffman]

We won't know until reloaders start working with it.

[panzermk2]

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.

[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

[Fotis]

[panzermk2]

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.

[panzermk2]

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.

[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.

[Fotis]

It was in a magazine and it was written by Brian Pearce. Anyway thanks for the insight

[claybrdr]

Curious as to whether the Ruger and/or the CMMC Banshee require lacquered cases like the FN or if they will function with cases with no remaining lacquer?

[Buffman]

They require the lacquer..

[panzermk2]

Yep

[Gunpoor]

Picked up a 57 before they became un-obtainium... Really like it! After much debate ive started to reload for it.... Literally 15 min ago shot a test run of 40gn vmax with 5.5gn accurate #5. Ruger liked em just fine. Were considerably more accurate than the AE 40grn i used to "warm up" with.
I e also ran a test batch of 35gn vmax with 6.5gn of acc#5 as well...
There is no tru blue to b found in my neck of the woods... I did aquire some Longshot and its up next for testimg purposes... I'm new to loading the 57 so im taking it slow and easy.....

[fredkali]

What is the purpose of the lacquer coating? To increase lubricity to help extraction from the chamber? To help seal the chamber during blowback cycling? To help the timing (slow down or speed up) of the blowback cycle? FN has included a sheet with my pistol that states the gun could blow up without the coating.

[Gunpoor]

The quick answer is feeding and extraction. Its gotta have it....... Do a forum search for particulars..........

[panzermk2]

It's need to allow the case and should to move while case is still under pressure. Normally say 45acp the case is sealed and locked to the chamber by pressure.

With a blow back operation you have case movement while it's under full pressure. Much like, as wierd as it sounds, the Oerlikon 20 mm cannon. The case is already ejecting while under pressure and if that timing is off BOOM. Also same reason why with no coating you can damage you gun and your hand.

[fredkali]

My Ruger 57 works fine with American Eagle 40gr and FN 197 40gr. It is not reliable with FN 198 27gr. and Fn 195 27gr. (All factory loaded, NOT reloads) Is this a problem with recoil spring power? Are the higher pressure rounds sticking in the chamber? Polish the Ruger chamber?

[panzermk2]

Not sure, AE is pure junk.

It might be an chamber issue. I have seen some of the early Rugers with chambers a bit on the tight side.

Also make sure to clean you chamber with Carb Cleaner to remove lacquer biuld up. NO bore cleaner, degreaser, or CLP will have any effect on removing the lacquer.

This vid was madew for the Five Seven but it 100% applies to the Ruger 57.

https://youtu.be/HPXXzrnaEek

[bluerev]

In my Ruger 57, the American Eagle 40g FMJ blows the shoulder approx 0.045 - 0.050" forward. Kinda shocking to see that for the first time. 6.0g of Blue Dot and a 40g Vmax blows the shoulder forward by about 0.030".

[rustypipes12]

I'm on my 2nd Ruger 57. I had to send the first in after it fired out of battery! the chamber didn't fully close on the round and the gun fired anyway. Ruger sent me a new gun , no questions asked! There was no real damage except a tiny lip in the plastic had broken off forward of the area where the slide locks in. I also had the bullet stuck 1/2 way down the barrel.