Molly Coating

[HPBT]

Hi folks,
I have a question about Molly Coated bullets, I've never shot them, so these may sound like lame questions.

A freind of mine has been shooting copper jacketed bullets from his rifle for many years. He wanted to change to molly coated bullets, so we spent a number of days scrubbing the rifle to make sure all the copper was removed.
After shooting 100 rounds of molly coated bullets, he decided that he didn't like them and went back to using copper jacketed bullets. Again we scrubbed the h3ll out of the barrel to remove any molly that was in it.
He loaded up his rounds and off to the range he went. He shot 10 rounds and cleaned his rifle, and the copper fowling was worse than when he cleaned it to shoot the molly. He used the same weight of bullet in both the copper and the molly, he never changed his powder load.

Question:
Will an over charged load cause the fowling to be that bad

Once he used molly, will he have to stay using molly or will he have to fight with the copper fowling forever, or is there something he can do to fight/stop this copper build up

Rifle caliber is a 264, bullets are 140gr Sierra

 

[ben hunchak]

I can't relate to the jacketed bullet fouling problem as I only use cast bullets....however I can switch between moly cast bullets and regular cast bullets without any loss of accuracy and I do even with my bench guns....so I think you will have to get some Sweets and go at it!

 

[maynard]

Why didn't he like the moly bullets once he started using them? Moly bullets require a bit most powder (maybe .5 grains more)then bare bullets to get the same velocity.
One advantage of moly is that you don't have to clean as often, maybe 500-1000 rounds. I had a barrel that had only shot moly bullets, after 900 rounds I cleaned it. It took about 200 more rounds to get it back shooting the way is was with 900 through it.
The barrel sounds like it is a fouler no matter what he shoots out of it. Is it a factory barrel by any chance?

 

[Splatter]

What possibly happened was this: When you "super-cleaned" the barrel you exposed roughness that had been hidden under a very hard coat of copper and carbon.

About 10 years ago bought a .30-06 that was made in the 1950's. It was accurate enough, and I cleaned it with the "Kleenbore Formula-3 Gun Conditioner" that came with my cleaning kit.
A couple yaers ago at a gunshow I bought some "Copper Melt", so I degreased the bore with brake cleaner and hit it with this Copper Melt. I used 1/2 the bottle getting all the copper out! And afterward the rifle shot like crap and fouled like crazy. I just kept shooting and cleaning. Now the rifle takes about 10 shots to "foul-in" then holds it's accuracy for about another 30, then the groups start to grow. Which suits me just fine, until I pop for a new barrel.

 

[HeadDamage]

I'm not sure what happens but I once used molly bullets in a 338win and when I went back to copper afterwards the barrel went for ####. It took untold hours of cleaning and shooting and more cleaning to get it shooting good again. I will not use molly again.