I bought some a year or two back and painted up some bullets. They looked cool but I never got up the nerve to "treat" the inside of the barrel like the manufacturer said. I was experimenting with a fussy 300wby ultrlight this
week and untreated 180 hornady bt's seemed to shoot pretty good. Then I loaded up a batch that had been coated with Ms moly and found the velocity was identical and my groups opened up.
Just curious if anyone else had this type of experiment. There was a guy on another site a couple weeks back that said that he had been marking some bullets with a sharpies marker and he swore that affected accuracy.....I found that a little hard to believe but if true....well then a spray job with Ms Moly could definately be looking for trouble.

Personally IMO Molycoating is a joke. It adds no value and is an emotional sell without substantive proof.

Drop it and get on with life.

I only use it in my varmint rifle as the advatage I've seen is far less fouling and a very quick clean up at the range or in the field. I won't use it in my big game rifles or custom barrels.

When moly coating came around as a popular fad for the third or fourth time in my lifetime, it was widely written up in Precision Shooting magazine (the journal of the International Benchrest Shooters), and Norma Precision not only adopted it for their bullets, they even said it gave those bullets easier passage through the air (!!) and thus a higher B.C. Many benchresters went to it (at least temporarily). So did I. I tried the original (NECO) kit, Ms. Moly, the Midway kit, and several other approaches. I used it on both jacketed and cast bullets.

After 3 years of using it in all sorts of settings from plinking to competition, here were my conclusions:

1. It was a time-consuming, MESSY piece of work.

2. It did NOTHING to improve the accuracy of my guns.

3. It added one more variable to the mix of things that could be done inconsistently, to the detriment of developing/maintaining "tuned" loads.

4. The moly itself became something that "cleaned" erratically from my bores. That is to say, cold-barrel/fouled-barrel accuracy differed more when using moly than when not using it. I think that MAY have been because normal cleaning sometimes removed more moly than it did other times.

5. Consistency of application of moly to the bullets was important...heavier applications shot differently than lighter applications(somthing else one had to become anal about to get maximum shooting consistency).

6. Bullets had to be used fairly soon after being moly'd, or else very carefully stored. Otherwise, moly would come off parts of the bullets to a degree where consistent application in the first place was pointess. The moly coatings ended up inconsistent over time anyway, as the bullets were jostled against various things, including each other.

Bottom line: I quit using ANY form of moly for ANY purpose. Shooting tiny groups is tough enough for me without more variables getting in the way.

I started using moly about a year ago in my 243AI The idea was to just see for myself what goes how many rounds before the barrel starts to go.. At the present time I have fired over 300 rounds both fireform and working up loads.
So far the throat has not moved.
accuracy is sub 1/2" moa @ 100yrds.
I have shot over a 120 rounds with out cleaning and accuracy was very good.
I just finished fireforming 100cases of lapua brass and plan on using 95gr berger and H4831SC.
I am loading 20 cases for a ladder starting at 44grs and a max of 48 grs these will be shot at 300yrds. across the chronagraph and recorded.
So far pressures seem to be on the low side all the cases that I have measured and observed
show no pressure signs. i have been up to 47grs using 75 gr sierra and imr4350. no problems very accurate load.
Dave

quote:

Originally posted by kraky:
...There was a guy on another site a couple weeks back that said that he had been marking some bullets with a sharpies marker and he swore that affected accuracy...

Hey kraky, If you see him post again, tell him old Hot Core said not to push on the bullets with the Sharpies so hard that he is deforming the bullets, or simply try it again when he is sober.

Before you commit yourself to the Ms Moly, try this:

1. Spray an un-seated bullet and a seated bullet with it and let it dry in the sun.

2. The next day when everything has had plenty of time to dry, Seat the fully coated bullet in an empty case.

3. Pull both bullets.

Once you do that, look at the full "Land Diameter" portion of both bullets and come back and tell me how much Ms Moly is on them.