Moly cotaed bullets load data.

[safer]

I have bought (dont ask ) some 308 Sierra SMK Moly coated 168gr bullets.
I know all about them cratering lower pressures allowing for biger loads.
But there must have been some manufacturers loading data published at some point.

Does anyone have any historic manufacturers loading data preferably for the above bulle?

 

[webley701]

I went through a phase of using moly coated bullets (Berger 210’s) for NRA Match Rifle shooting some years ago, including moly coating bullets using the kit made by NECO. As you mention, generally you can end up using somewhat higher powder charges with the coated bullets - most people, myself included found it wasn’t worth the effort of buying coated bullets (nor coating them ourselves) for the resultant slight increase in velocity.

What generally happened when using a coated version of a particular bullet was the muzzle velocity was lower than the un-coated one (for the same powder charge); the charge was then increased until the velocity was back to normal. It was then usually possible to increase the powder charge (to a small degree) to get a higher velocity without any apparent ill effects. Frankly it wasn’t worth the bother & usage of barrel life in testing.

I’m assuming you have the original 168 MK’s rather than the alternative tipped version. If so, it’s a bullet that’s best at short range (i.e. up to & including 600 yards) so there’s little point in trying for “bigger loads” as the bullet doesn’t perform as well as others when you get to 900+ yards.

 

[safer]

I went through a phase of using moly coated bullets (Berger 210’s) for NRA Match Rifle shooting some years ago, including moly coating bullets using the kit made by NECO. As you mention, generally you can end up using somewhat higher powder charges with the coated bullets - most people, myself included found it wasn’t worth the effort of buying coated bullets (nor coating them ourselves) for the resultant slight increase in velocity.

What generally happened when using a coated version of a particular bullet was the muzzle velocity was lower than the un-coated one (for the same powder charge); the charge was then increased until the velocity was back to normal. It was then usually possible to increase the powder charge (to a small degree) to get a higher velocity without any apparent ill effects. Frankly it wasn’t worth the bother & usage of barrel life in testing.

I’m assuming you have the original 168 MK’s rather than the alternative tipped version. If so, it’s a bullet that’s best at short range (i.e. up to & including 600 yards) so there’s little point in trying for “bigger loads” as the bullet doesn’t perform as well as others when you get to 900+ yards.

Thank you webley701

I am just going to load them with max load for the same non-coated bullets and maybe play with seating depths. As you said I am not shooting more then 600 yards anyway.

 

[jthyttin]

I've used moly on few barrels. IME you could push the "cleaning window" significantly with moly (how many rounds fired before risk of flyers). Those were chrome moly Lothar Walther barrels, just the regular ones no factory lapping etc. If moly paste was used after cleaning, accuracy was bang on starting with first shot.

If you want to coat bullets, I guess HBN is better than moly in just about every way. Haven't tried it, and it seems the coating craze has fallen out of popularity...