Moly coated bullets, The good the bad The ugly???

[burntmuch]

Just picked up a remington 700 in 223. Ive shot some winchester 45 grain jhp .seems to shoot real good. But after 4 shots or so the barrel is real hot, If I dont let it cool for 5 min or so. The groups open up a bit. Now will moly coated bullets help. What are the pros & cons of the moly coating. Im gonna have to wait a few weeks before I can reload for this (cause Im broke)   Any input is
appreciated. Thanks Jay

[stimpylu32]

Jay

The moly is not going to do anything as far as the barrel heating up , some guys like them , I don't care for them much when you figure in the price difference between them and normal jacketed .

They say that the moly coating makes for less drag down the barrel and as such you have diffrent pressures as in the same round used with standard jacketed bullets so diffrent load data must be used .

Another thing is that if you do shoot moly bullets you will need to clean the barrel REAL GOOD before you go back to normal jacketed or you will have a mess on your hands ,

I made that mistake once -- will NEVER do it again , it took several hours of scrubbing to get the moly out of the barrel to the point that it would shoot groups again with any bullet . 

stimpy

[Graybeard]

There is no good only bad and ugly. The moly coating builds up and can trap moisture in your barrel causing the barrel to rust. Many folks have found this out the hard way. Trying to get moly out once you have it in is a real PIA and there are no benefits to outweight the negatives. It was a fad at one time perpetuated on us by the folks who sold it and the magazine writers whose job it is to sell whatever product advertisers want pushed at the moment.

[Catfish]

What they said.  I ruined a .17 Rem. barrel with molly build up. The only way I found to get out the Molly was to fire lap it, and that really wears out a barrel fast. I will never shoot Molly again.

[john keyes]

good info guys, thanks.

everytime I saw moly bullets for sale I didn't know what to think about em.

I'll steer clear of em.

[LaOtto222]

I have never shot moly bullets or coated a copper bullet in moly. I have read too many stories like the ones above, besides I have always had good luck with "plain" bullets so why change? I have only and will continue to shoot copper jacketed bullets with no moly.

BTW the bullet going down the barrel has little to do with the barrel heating up, it is the friction of the unburnt and partially burnt powder going down the barrel that causes most of the heat build up.

[burntmuch]

Thanks guys . Sounds like their not worth the heartache.