PDA

View Full Version : "Polymer" coating


ANGST
03-14-2007, 10:45 AM
Has anyone actually expierinced issues with their PS90 due to lack of coating on their reloads ?

Medula Oblongata
03-14-2007, 10:49 AM
The coating is laquer, not polymer.

There do appear to be problems with extraction in the carbine, but not the pistol.

Others who actually own one can probably elaborate more. I only own the pistol. I have only heard second hand of the extraction problems and some anecdotal evidence to support it, although this appears to be the general consensus.

Hope this answers your question :)

madoc
03-14-2007, 09:25 PM
I haven't run into any issues with the coating on my reloads through my PS90, but then all of the reloads I have shot so far are only on their second go around, and so they still have a pretty pristine coat. I did run into so sticking, but that was most likely due to leaving sizing lube on the cases, and hasn't happened since I started cleaning the brass after sizing.

Medula Oblongata
03-15-2007, 12:24 AM
Leaving lube on the brass is a no-no.

If you have any more specific questions, I'll be more than happy to answer.

ANGST
03-15-2007, 09:08 AM
The coating is laquer, not polymer.

There do appear to be problems with extraction in the carbine, but not the pistol.

Others who actually own one can probably elaborate more. I only own the pistol. I have only heard second hand of the extraction problems and some anecdotal evidence to support it, although this appears to be the general consensus.

Hope this answers your question :)

I have heard exactly the same thing, but I was looking for first hand accounts. It seems the coating lasts ~4 reloads , and that Moly-ing the cartridges may seem to help.

Just wondering if anyone had done any actual testing.

Medula Oblongata
03-15-2007, 12:31 PM
I have several thousand pieces of brass where I have reloaded them 10+ times and there is still a healthy amount of laquer left. I also have some with none. I have tumble lubed some of my brass with molybdenum powder and its worked just fine in some of my buddies carbines.

BTW I don't tumble my 5.7x28mm brass clean after resizing, I instead wash it in simple green and warm water. I put it in a wet media tumbler and let it go for a few minutes, then rinse and set on a ventillation grate overnight to dry.

grendelbane
03-23-2007, 12:59 AM
I have not had any problem with my PS90 so far, and some of my cases are on their 4th re-load. I am careful not to tumble them much.

user426
04-15-2007, 03:53 PM
I have not had any problem with my PS90 so far, and some of my cases are on their 4th re-load. I am careful not to tumble them much.

I'm new to reloading this round.....what media and how long a tumble time would you recommend to clean the brass.....

Medula Oblongata
04-15-2007, 03:56 PM
I would recommend reading post #6, and then using the search function if that doesn't answer your question. Use the search keywords "simple green" and "brass." :)

btown02
04-15-2007, 04:12 PM
I'm new to reloading this round.....what media and how long a tumble time would you recommend to clean the brass.....
Welcome to the forum. As has been said you can find the information using the search.

Reverend Spanky
04-20-2007, 12:32 PM
Re: lacquer, the guy at my range who talked me into a PS90 has been tumbling it completely off of his once-fired brass. He didn't mention any problems with feeding the rounds semi-auto. I'm curious as to whether the lacquer / feed reliability issue is more prevalent with the P90?

btown02
04-20-2007, 12:34 PM
I'm curious as to whether the lacquer / feed reliability issue is more prevalent with the P90?
It seems to be a problem more for the pistol.

Reverend Spanky
04-20-2007, 12:37 PM
It seems to be a problem more for the pistol.

Ah, I misunderstood. Somewhere I'd picked up that it was a P90/PS90 issue. Thanks.

btown02
04-20-2007, 12:39 PM
Ah, I misunderstood. Somewhere I'd picked up that it was a P90/PS90 issue. Thanks.
It is to a smaller degree. FN says the coating should not be removed for use in either weapon.

Medula Oblongata
04-20-2007, 03:30 PM
Re: lacquer, the guy at my range who talked me into a PS90 has been tumbling it completely off of his once-fired brass.
Wow, how long was he tumbling, and with what media?

I've tumbled for 48 hours in corn cob and walnut purposefully trying to get the laquer off for presentation rounds. Never was able to get it all off. Even sand paper and steel wool take quite a bit of time.

I'd honestly like to know what he's using :)

craig@yakamora.com
04-29-2007, 05:48 PM
I would recommend reading post #6, and then using the search function if that doesn't answer your question. Use the search keywords "simple green" and "brass." :)

But post # 6 doesn't answer the question.... he wants to tumble his brass.....not wash it.... if you don't know ...just say so

panzermk2
04-29-2007, 06:15 PM
you tumble it in the solution. A wet tumble in a tumbler with a sealed bowl like the frankford arsenals. Yes its a wash but tumbled. Tumbling does not always mean dry. that may have been the cause of the confusion

Medula Oblongata
04-29-2007, 06:32 PM
But post # 6 doesn't answer the question.... he wants to tumble his brass.....not wash it.... if you don't know ...just say so
I'm going to be polite, assuming that you had a legitimate point, rather than trying to cause an argument.

Panzer's answer sums it up.

Have you any other comments, questions, or concerns? :)

btown02
04-29-2007, 07:17 PM
But post # 6 doesn't answer the question.... he wants to tumble his brass.....not wash it.... if you don't know ...just say so
Welcome to the forum, and be nice.

Reverend Spanky
05-01-2007, 01:18 PM
Wow, how long was he tumbling, and with what media?

I've tumbled for 48 hours in corn cob and walnut purposefully trying to get the laquer off for presentation rounds. Never was able to get it all off. Even sand paper and steel wool take quite a bit of time.

I'd honestly like to know what he's using :)

I'll ask, next time I bump into him.

craig@yakamora.com
05-03-2007, 06:59 AM
you tumble it in the solution. A wet tumble in a tumbler with a sealed bowl like the frankford arsenals. Yes its a wash but tumbled. Tumbling does not always mean dry. that may have been the cause of the confusion

Yes that does clear it up......thanks .....