Moly ?

[17 rem savage]

hey guys I'm looking into coating up some 30cal. bullets for my 308. Whats the best moly to use, and best way to clean the bore after use? Also with the 308 and moly bullets in there enough case volume to take advantage of the loss in pressure? hope that makes sense..

Thanks for your help.

 

[Turbulent Turtle]

Is there a specific reason you want to moly-coat your bullets?

 

[FroggyOne2]

The general thought is, with a 308 that if using a mol'yd bullet, that you can't get enough Varget in the case. At least that was the way it was for me and the 155's. But then after that, I stopped using moly with the 308 too.

 

[ar10ar15man]

coating bullets is covered in an article posted in the other parts of this lovely place....
as to cleaning, one does not clean moly out of a bll. one coats the bore with moly and tries to perserve a nice coating from one end to the other...
clean with chemicals and patches..do not disturbe the coating..

clean for carbon first..as it will build up....

 

[Bob3700]

Have been moly coating bullets since the process was first introduced. I find that the bbls clean up easier with the coating. Don't think that it adds accuracy or bbl life.

Am using Win cases in my Palma rifle and they are in the 156 to 158 gr weight range. I can easily get enough Varget in the cases to push a 155 SMK over 3000 fps without excessive pressure signs. That said, if you are using Lapua brass that weighs 174 grs +, that might not be the case.

Bob

 

[17 rem savage]

thanks guys,

Really appreciate the info. I'm shooting 185-200gr bullets under IMR-4064 in lapua cases, I'm want to run the moly to cut down on cleaning's during match shooting, plus i feel if i could get 20-25 fps more i would hit my higher node. I can do it now but at the expense of brass.

 

[ar10ar15man]

hmmmmmmmmmmmm
moly does not add velocity ........
the one and only thing that moly can do..is allow the same accuracy..LONGER....
no improvement in accuracy.....simply the same accuracy longger before cleaning...

thanks guys,

Really appreciate the info. I'm shooting 185-200gr bullets under IMR-4064 in lapua cases, I'm want to run the moly to cut down on cleaning's during match shooting, plus i feel if i could get 20-25 fps more i would hit my higher node. I can do it now but at the expense of brass.

 

[bozo699]

hmmmmmmmmmmmm
moly does not add velocity ........
the one and only thing that moly can do..is allow the same accuracy..LONGER....
no improvement in accuracy.....simply the same accuracy longger before cleaning...

thanks guys,

Really appreciate the info. I'm shooting 185-200gr bullets under IMR-4064 in lapua cases, I'm want to run the moly to cut down on cleaning's during match shooting, plus i feel if i could get 20-25 fps more i would hit my higher node. I can do it now but at the expense of brass.

I would tend to agree with this statement.
Wayne.

 

[Cody Richardson]

Im using the lapua cases with the 155.5 berger Moly coated bullets and I am at 2975 with 46.7 with not one hint of pressure signs. I have seen more advantages with heavier bullets due to the lower amount of powder in the case. Im running 43.5 on a 185 load and once again I am at 2775 and have no signs of pressure. I could go up in powder to increase velo but I feel the load shoots and I have no pressure, I have had shooters with the same load say they have pressure signs, now I know all rifles are different but... Yes Moly does not increase velo BUT it reduces pressure which allows more powder which leads to more velo. As for cleaning, just cleaned after 472 rounds and my last string on a practice day was just as good as when it was clean. Hardly any copper fouling.

 

[17 rem savage]

This was my main question, when you moly the bullets the pressure drops due to the lower friction, now with the lower friction this allows you to bump the powder up, and increase velocity correct? Now with the 308 case is there enough case volume left to gain that 20-30 fps I'm looking for, and is it worth it? My currunt load is 44.6gr of IMR 4064 lapua case with D-46 lapua 185's. With my AOL of 2.88 i figure my currunt load volume is about 96%.

 

[tenring]

I have been shooting a Savage LRPV .223 in competition since I bought it new about 5 years ago. I record every shot thru it. I have always moly coated the bullets, 99% of these being Berger 80 gr. VLD's. The factory barrel now has almost 2,500 rounds thru it, and I am concerned about throat erosion. I took it to my gunsmith couple days ago, and had him bore scope it. He said the throat looked real good. There was minimal firecracking evident several thous ahead of the leade, that was the only problem he could see and that was not much. No, moly won't help accuracy, but it shur does extend throat life.

 

[FroggyOne2]

Moly, is nothing more than another load development componet. No different than say the primer, brass, bullet or powder you chose. The thing about moly is that with many powders, it will allow you to get closer to 100% load density. This is the way I look at using moly.

This the way I will always view the use of moly or other products like Danzac or HbN.

 

[ar10ar15man]

no..it allows you to restore original velocity..IF YOU HAVE USEABLE CASE CAPACITY....

if you go up now with out moly an dget your next node, there maynot be enough case capacity to restore to this new velocity if you go to moly...
make sense ??

This was my main question, when you moly the bullets the pressure drops due to the lower friction, now with the lower friction this allows you to bump the powder up, and increase velocity correct? Now with the 308 case is there enough case volume left to gain that 20-30 fps I'm looking for, and is it worth it? My currunt load is 44.6gr of IMR 4064 lapua case with D-46 lapua 185's. With my AOL of 2.88 i figure my currunt load volume is about 96%.

 

[ar10ar15man]

i suppose that is true if you are close with your load before moly, but what if the case is already full ??

again moly has one benefit..it allows the rifle to shoot the same level of accuracy longer between cleanings.....

moly does not stop throat errosion......it may reduce it..but that is a big may. if the bbl is properly coated the heat from the flame is shielded by the moly coating...spreading the typical throat heat over a longer area..
it takes x enrgy to move a 90 grain bullet to z fps......that is heat.....if the 90 gr load is a mild load the throat may last longer based on powder choice.....

Moly, is nothing more than another load development componet. No different than say the primer, brass, bullet or powder you chose. The thing about moly is that with many powders, it will allow you to get closer to 100% load density. This is the way I look at using moly.

This the way I will always view the use of moly or other products like Danzac or HbN.

 

[17 rem savage]

Thanks guys,

I guess i can give it a try and see if i can get it to shoot the way i want it to. I have one more question, with moly will you see the same accuracy if you return to your original load speed or will you have to tweak your fps when using moly?

 

[Citysmasher]

http://www.urbanrifleman.com/2013/04/11/wet-moly-coating-method/

 

[ar10ar15man]

to maintain the accuracy you have now, you will typically have to bump your load a little to get back up to the velocity where your accuracy was.....small powder bump...say .1 to .3 is typical to restore velocity.

 

[Turbulent Turtle]

Sorry for the delay in coming back here.

I have been using moly coated in my first F-TR rifle because it is a .223 Remington with a 26 inch Krieger barrel and I had found a node at a tic over max load. I wanted to decrease the pressure because it was beating up the brass. So, I started moly coating the bullets increasing the load a little bit more and the brass was not getting beaten up as much.

I do not subscribe to the theory that barrels last longer because you shoot moly coated bullets.

I am not so sure if moly coated bullets allow you to shoot accurately with less cleaning. I never clean during a match anyway.

I do know that moly-coating is a pain and it's an extra step and it creates issues in the barrel of which you must be aware. Also, once you go moly, you can't really go naked in the same barrel, regardless of how much you scrub.

My next two F-TR rifles have never seen a moly-coated bullet. I switched to .308 WInchester, increased the barrel length to 32 and was able to find nice accuracy nodes just below maximim load at a velocity that was greater than the minimum I required. Now my .223 only shoots 300yard matches and I don't need the supermax velocity I needed for 1000 yards.

 

[Citysmasher]

I do know that moly-coating is a pain and it's an extra step and it creates issues in the barrel of which you must be aware. Also, once you go moly, you can't really go naked in the same barrel, regardless of how much you scrub.

No...

Dawn dish soap on a brush removes the moly from the barrel. At least enough.

Moly does not build up. There lots of guys who go back and forth between naked and coated.

 

[Citysmasher]

http://benchrest.com/archive/index.php/t-56601.html