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Propylene to combat cold weather?


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#1 Midgetnamedgordo

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Posted 23 October 2013 - 12:34 AM

Saw an old video on scoutthedoggies page where Daedelus talks about using propylene to help cold weather performance. Wondering if anyone from the Lm4 community has any input.

Links:

Edited by Midgetnamedgordo, 23 October 2013 - 12:36 AM.


#2 Epitaph

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Posted 25 October 2013 - 01:24 PM

Tried it for a bit last year but wasn't a big fan. The Propylene didn't seem to fair any better than propane. Below is the footage I shot that day, I apologize for the excessive 'dudes' and 'bros'... it happens.



I believe it was about 29-30 degrees.

Notice the sluggish cycling and giant puffs coming from the ejection port, while I still had that problem with Propane it didn't seem as pronounced. Also I noticed the Propylene made the mags very cold after being emptied and would take much longer to warm up than a mag on Propane.

#3 mr.ying

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Posted 02 November 2013 - 10:15 PM

View PostEpitaph, on 25 October 2013 - 01:24 PM, said:

Tried it for a bit last year but wasn't a big fan. The Propylene didn't seem to fair any better than propane. Below is the footage I shot that day, I apologize for the excessive 'dudes' and 'bros'... it happens.



I believe it was about 29-30 degrees.

Notice the sluggish cycling and giant puffs coming from the ejection port, while I still had that problem with Propane it didn't seem as pronounced. Also I noticed the Propylene made the mags very cold after being emptied and would take much longer to warm up than a mag on Propane.

Did u piston jam into the bolt carrier much? I was playing today in 1 degree celcius wit mapp gas didnt have much problem expect for the piston jamming sometimes, so what i would do is after ever long skrimish game i would drop silicon oil into the piston would cycle fine. Btw what kind of lube r u using on ur gun

#4 Chuck S

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Posted 03 November 2013 - 04:55 AM

Don't they teach English in Canada anymore?  ...

-- Chuck

#5 General Pickle

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Posted 03 November 2013 - 10:09 AM

View Postmr.ying, on 02 November 2013 - 10:15 PM, said:

Did your piston jam inside the bolt carrier much? I was playing today in 1°C conditions with MAPP gas and didn't experience many problems except for the piston jamming sometimes, so what I would do after every long skirmish game I would drop silicone oil into the piston and then the system would cycle properly. By the way, what kind of lubrication are you using in your gun?

Fixed.

#6 mr.ying

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Posted 03 November 2013 - 11:26 AM

Nope i speak french lolll.

#7 bigcandy01

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Posted 04 November 2013 - 07:37 AM

I have used MAPP with my LM4 in 30-60 degF weather.  Im in Texas, so the weather varies that much in a day.

It works fine.  

Its dirty and stinks like sh*t.  Noticeably more grim on the bcg and in the barrel after a full days use.  

No noticable problems with the mags (O-ring wise) or the bcg (but they get replaced on a fairly normal basis).

#8 Epitaph

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Posted 07 November 2013 - 10:00 PM

View Postmr.ying, on 02 November 2013 - 10:15 PM, said:

Did u piston jam into the bolt carrier much? I was playing today in 1 degree celcius wit mapp gas didnt have much problem expect for the piston jamming sometimes, so what i would do is after ever long skrimish game i would drop silicon oil into the piston would cycle fine. Btw what kind of lube r u using on ur gun

I didn't get any jams or sticking nozzle, but I always lubricate the main nozzle oring after long games, as you did, to ensure consistency and reliability.

You know, I am beginning to think I may have done something wrong when I was using propylene in this video. Perhaps it was colder that day than I was told? I hear nothing but good things with propylene and cold temps, but I didn't see any benefits that day. May have to give it another go this winter and post up.

Edited by Epitaph, 07 November 2013 - 10:01 PM.


#9 mr.ying

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Posted 08 November 2013 - 02:38 PM

View PostEpitaph, on 07 November 2013 - 10:00 PM, said:

I didn't get any jams or sticking nozzle, but I always lubricate the main nozzle oring after long games, as you did, to ensure consistency and reliability.

You know, I am beginning to think I may have done something wrong when I was using propylene in this video. Perhaps it was colder that day than I was told? I hear nothing but good things with propylene and cold temps, but I didn't see any benefits that day. May have to give it another go this winter and post up.

Give it another try, this was the one I used http://www.homedepot...0131108223758:s

#10 Mayhemxxx

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Posted 08 November 2013 - 05:09 PM

Similar FPS or is this out of the question?

#11 mr.ying

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Posted 21 November 2013 - 02:37 AM

View PostMayhemxxx, on 08 November 2013 - 05:09 PM, said:

Similar FPS or is this out of the question?

Should be similar during the cold weather to propane, but when it summer time, mapp spikes the fps

#12 Chuck S

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Posted 21 November 2013 - 03:32 PM

Any further data on this?  Does cold weather performance improve?  Going well below freezing this weekend on the North Coast and  can cold soak a magazine or two with MAPP gas inside.

-- Chuck

#13 Chuck S

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Posted 23 November 2013 - 05:12 AM

I intended to test MAPP today but the stench of the gas is so awful I fear I'll never be able to bring any gun that used it into the house again.  Test abandoned.  Magazines (2) dumped and running propane and green gas thru them to rinse them out.

Any cold weather shooting benefit is massively over-weighed by the stench. :(

-- Chuck

#14 General Pickle

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Posted 23 November 2013 - 10:45 AM

View PostChuck S, on 23 November 2013 - 05:12 AM, said:

I intended to test MAPP today but the stench of the gas is so awful I fear I'll never be able to bring any gun that used it into the house again.  Test abandoned.  Magazines (2) dumped and running propane and green gas thru them to rinse them out.

Any cold weather shooting benefit is massively over-weighed by the stench. :(

-- Chuck
LOL. Thanks for taking one for the team.

#15 Chuck S

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Posted 24 November 2013 - 05:47 AM

Nine bucks for the team ain't bad.  I've received more value from this forum than that!

MAPP may work.  But it ain't going thru my guns.  At 20°F the cold soaked magazines vented with plenty pressure so folks near a pig farm may not find the smell offensive.  :)  

Now I gotta find a way to dispose of the full cylinder.  I'm not bringing it in the house or putting it in my nice new shed either.  Gotta see if I can burn it in my propane torch out in the back yard.  'Way out in the back yard.

-- Chuck

Edited by Chuck S, 24 November 2013 - 05:49 AM.


#16 Epitaph

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Posted 01 December 2013 - 12:41 PM

I have not done any further cold weather testing, been too busy as of late.

As for the stench of MAAP, I'm surprised with what some people have said about it. Maybe the can I have contains less "stink" in it as I think the propane smells worse... that or my sniffer is broken.

#17 mr.ying

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Posted 01 December 2013 - 11:37 PM

View PostEpitaph, on 01 December 2013 - 12:41 PM, said:

I have not done any further cold weather testing, been too busy as of late.

As for the stench of MAAP, I'm surprised with what some people have said about it. Maybe the can I have contains less "stink" in it as I think the propane smells worse... that or my sniffer is broken.

I would agree. I think propane smells worse LOL! I am using Bernzomatic map/pro, it is not that bad.




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