Disposable Rounds

Post by GZ22

Okay gentlemen, I would like to consult you all.

As part of my activities to provide disposable rounds I now need to ask you about the current cartridges you all use.

I am aware that the CP cartridges exist, and are different to some other types out there. My main questions are these:

1) If I provide rounds where the composition inside the cap faces forwards will this be suitable for all guns, or will the composition need to face backwards in some of them?

2) I assume that all rounds, regardless of type, operate on a sealed chamber & piston system? (excluding 12g shotgun rounds).

3) As long as there is an opening in the front of the round, I assume that all detonator pins will be able to access the piston, or do some operate to the rear?

As much information as you can provide me with will be put to great use. The advent of disposable rounds for all is near. I will need your help in order to get the right product developed. To that end I would like to use some of you as testers for prototype products, so please let me know if you are willing to volunteer for this.

Many thanks,

GZ

Post by Claymore

As far as which way the cap faces, if the round uses a piston with the pin on it then the cap will face forward only the marushin rounds have the caps face backwards as the pin is on the base, the forward facing cap is to me the better way.

not all rounds operate on the sealed chamber and piston, older rounds are open like empty cases but the new style are cp (piston) type, most of use use the cp type but my ingrams run open as i find them more reliable for that particular model, anything with a metal bolt will need the new type cp round to perform well.

No rounds operate to the rear as far as det pins are concerned so a the rounds would have to have the hole in the head of the bullet.

hope this helps if you have any more questions just ask away as this sounds very interesting, what sort of round size wise are you looking at becaus they all vary in size requiring different size det pins and extractors. may i suggest a p220 round as a good start as many modelguns are converted to this round, uzi, mp40 etc and the wa shan models work with this.

Post by GZ22

Ah, good news then! - If the Uzi, MP40, Wa Shan and Glocks all work with the Tanaka 9mm round, we will begin with that one.

Post by Claymore

No not tanaka its the MGC sig p220 round and its used in a lot of modelgun upgrades so yep good one to start with, do you have a sig p220 if not i can send you one

Post by GZ22

Oh sorry, I didn't realise. Is the SIG 220 9mm round the same size etc. as the disposable rounds that you get with a Wa Shan pistol? Because the ones that come with Wa Shan models are the ones I'm working off.

Post by Claymore

Not exactly the same but pretty close hence why they can be used in so many models, the wa shan rounds are the same size as marushin 9mm for the uzi mp40 but the inner disc is too thin in the marushin round for them to work in the wa shan, when you use the p220 in the uzi or most mp40's or the sterling then the det pin has to be shorted by about 1 to 2mm but the extractor normally needs no adjustment.
i can send you a p220 round so you can compare if you want

Post by Mark

AS far as the disposable rounds go, I would like to have at least a few of them for testing. They would be a very big boost to the modelgun hobby if they work as well as I hope. The fact that the disposable cartridges look like the MGC SIG 220 cartridges is nice as the SIG 220 cartridges are popular conversion cartridges.
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Wanted to buy: MGC Sten MK3....trades?(still)

MGC MP40 Marushin MP40 Nakata MP40 TRC MP40

Modelgun manufacturers, past and present:CMC,CAW,Hudson,HWS,LS,MGC(R.I.P. 1960's~2007) Marushin,Marui,Kokusai,Shoei,Tanaka and Western Arms

Post by GZ22

That's not a problem Mark - I'll be happy to get some to you for evaluation.