Moly coated bullets

[Turnup]

I found them to make a significant improvement in my .357 SW 686 for target shooting but I was never quite sure if it was the moly. I had noticed that the moly coated bullets I was buying were a tad less in diameter than the ordinary ones. Then a friend suggested that I try 9mm TC bullets (which are two tads less in diameter), and they worked just as well! Was not able to explore this much as it was mid 1997.......

Also experienced a lot less leading with coated bullets.

I have not heard of issues reverting back to non coated bullets, I would have thought that a thorough clean first would suffice. It is true that you should not follow lead bullets with jacketed bullets without first really cleaning the bore. The harder jacketed bullet will smear any lead residue into the bore wall, leaving small deformations in the bore wall which become lead magnets - don't ask me how I know .

[JB101]

I use moly coated in 6mmbr & 6.5x284
Primarily as one can get a higher velocity with less pressure than a std jacketed bullet.Also for the 284 it seems to have improved barrel life.
However I'll probably revert to std jacket bullets for the 6mm and may well try molly coating them myself as the cost is increasing for the precoated ones .

ATB
James

[optima silk]

Cheers for the feedback guys

[vbull]

Back in the 90's there were companies that properly Moly coated the bore of your rifle which was the advice given at the time if you wanted to use Moly coated bullets for whatever reason. The problem with just using Moly bullets was that they left a residue in the bore which could affect accuracy by causing slight inconsistencies as it was not an even coating and could not be completely removed during normal cleaning so you would get buildups of the stuff in patches. I remember when the fad started as I was a benchrest shooter at the time and it didn't take long for us to realise it was not as good as all the hype had led us to believe, in fact, when I collected a new bench gun from Dave Tooley he advised me not to use the stuff. IMO I can't see any benefits from using it.

[stillair1]

Perhaps HBN would be a modern alternative.

https://www.youtube.com/watch?v=rDHYzGg7Ucc

[Treebone]

Perhaps HBN would be a modern alternative.

https://www.youtube.com/watch?v=rDHYzGg7Ucc

I thought HBN would be a good idea some years ago so bought 4oz of the stuff on a group buy, it did not make a jot of difference.

TB.

[PhatMan]

optima silk,

I used moly coated Lapua Scenar 0.308 155s for fifteen (15) years in my custom BAT rifle.

I had the luck to buy 1000 of them for £12/100 in the year 2000

What I can tell you :

1) The moly coating did not increase accuracy compared with standard, un-coated Lapua Scenar 155s, nor was the ballistic performance increased. Both grouped in 0.15" to 0.25" (10 shots) at 100 m.
2) For a custom, finish lapped barrel like I had (Krieger cut rifled, 0.298" internal dimensions), the moly coats really did not make much of a difference to the amount of cleaning needed.
3) Despite the moly, small amounts of copper were still deposited, along with moly & powder residue.
4) Cleaning - I used IOSSO bore paste to clean my bores, and it took the same amount of effort to clean after the moly coats, as it did for the un-coated. Two short stroke passes with IOSSO Bore Patse on a cotton patch wrapped around a 7mm bronze brush, a check with Butches Boreshine for residual copper, and that was it.

It seems that moly, as has been said, was a fad that has now passed.

A chappie from Sierra bullets (Mr. Kevin Thomas) did a test for Precision Shooting magazine, and found that moly did not increase barrel life, did not increase accuracy, did not alter the ballistic performace, and did not materially decrease the cleaning requirements.

It seems the only thing that was definitive about moly, was that you had to increase the powder charge to get the velocity back up to that of the un-coated bullets - this seemed to be in the order of 0.5 to 1 grain more.

I never suffered from the other moly characteristic - the first round or two after cleaning not being in the group.

So, don't bother about moly

If you do, invest in some IOSSO Bore Paste !

Have fun & a good Sunday,

Best regards

Russ

[Parabuteo]

I thought HBN would be a good idea some years ago so bought 4oz of the stuff on a group buy, it did not make a jot of difference.

TB.

I have known an F Class shooter who used that stuff. It caused a build up in his barrel and buggered the accuracy until he finally managed to clean it out.

Good quality copper bullets have been about for years.....you have to wonder why

You dont see Molly about much now

[kindwarf]

I use moly coated in 6mmbr & 6.5x284
Primarily as one can get a higher velocity with less pressure than a std jacketed bullet.Also for the 284 it seems to have improved barrel life.
However I'll probably revert to std jacket bullets for the 6mm and may well try molly coating them myself as the cost is increasing for the precoated ones .

ATB
James

I have used Lapau silver tips in my 6.5 x 55 F class rifle buy them by the 1000, very accurate less pressure and just a couple of patches to clean.