Moly coating and the 6BR

Hello Everyone

First time poster, long time reader.

Thanks to Mr Dundas I have become fond of fly shooting attending a few of his rimfire comps.
I am a regular in the Mudgee region and I plan to come and shoot the fly matches up there where possible.

I recently purchased a Bartlien 30" Barrel that will be chambered in 6BR and fitted to my old Omark that received a good freshen up a couple of years back.
I plan to use this rifle for a bit of casual comp and to test out some stock designs to oneday duplicate using my copying machine.


I have never tried moly coating and with a new fresh barrel I thought it would be a good opportunity to see what its all about.

My concern is will moly take too many fps away from the 6BR and leave me with not enough spare case volume to make up lost speed?


To my understanding 6BR is a pretty common cartridge in your game and before I waste the money on moly and ruining some pills I thought I would seek your advice whether to moly or not?

Thanks in advance

JH

Hi John,
You most certainly will lose fps when molying projectiles,..possibly as much as 80 fps which in the greater sceme of things is probably not much.
Anthony Hall shoots a 6 BR and coats his projectiles with which he just shot an Australian record small group at 500 meters in last weekends match at Wagga, so..not a problem for Anthony.

The main reason shooters coat projectiles, though, is so we can shoot an entire match (say 50 rounds) without having to clean the barrel. Moly won't make the bullets fly straighter but you will get more shots between cleans. That said, plenty of shooters use naked bullets and don't clean during a match.

I'd probably run without moly 1st & see how the barrel fouls…..you might not need to moly!

Regards,
Belly

Thanks for the advice .

I am dropping the action and barrel off  today and had a enlightening moment and decided that I will go 6BRX

I will run moly and should easily maintain the speeds .
I have a set of Redding Comp 6br dies lined up hence not going up the dasher road.


Are the BRX claims true that fause shoulder fire and enjoy . No donuts no turning needed true ?

Ha! ….lot of theories out there but this is one topic I am qualified to talk about as I have shot the Brx in various forms for a few years now.
Assuming you will use Lapua 6 Br brass. If you don't wish to turn necks you will need min barrel chamber neck diameter of  say.270, but any reasonable diameter greater than .270 will do.

If you can manage a false shoulder by expanding the necks and then resizing part of the neck then go for it. I have gone down that path & had some frustrating results with large variances in finished case length, ( I might have buggered it up though). Put a good amount of neck tension when resizing the neck, say 4 thou under loaded round neck diameter and seat bullet well into lands so the case doesn't move forward under firing pin pressure & you will end up with a reasonable job.

Regards,
Belly

Funny enough Matt Paroz said the except same thing about case length variances and convinced me to go the standard br.

He also suggested I will need a extra reloading die like 3006 ect to size the last bit of the 6br dies won't reach .


Back to plan A

I will find out in 6 weeks if I made the right choice .

Thanks again

im getting a 6BRX built atm
i will be using the jam method to fire form my cases as doing the false shoulder is to much work (and i don't have a 6.5 mandrel)and the reasons why Belly said
i have gone a .270 neck but am turning my necks so i have .003 clearance on loaded round
i will also be using my 6BR dies plus a 243 die to size my cases, as you said the 243 to touch up the base of the case,
once i have some money again i will send a few cases off and get a custom die made up  

never tried the moly rounds in any gun so can not comment on them
oh and i'm going from the 6BR to the BRX