Throat Erosion - New Barrel

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Originally Posted by northdude

Because i have a bottle of brasso here and would have to buy the autosol so brasso would be the inexpesive option here

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Well fill ya boots and report back in a few months on what the borescope/target tells you. Who knows, might even work.

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Originally Posted by small_caliber

It seems no one has considered that a carbon wrapped barrel has had the diameter of the metal part of the barrel reduced, therefore the steel part of the barrel will heat up quicker.

Does anyone know the heat coefficient property of Carbon Fibre?


Is the Carbon Fibre trapping the heat in the metal part of the barrel or is it removing the heat?
Has anyone done a test on this?

If the heat is being trapped in the steel part of the barrel then how will this affect throat erosion?

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Google proof reasearch barrels.

Done properly carbon wrapped barrels outlast plain steel.

I dont know how hardys are made.

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Originally Posted by shooternz

Yes he did, I spent a lot of time at Steves place the north shore all his barrels were polished with Auto Sol, He recommend that
barrels were Auto sol'ed when new it helps with copper fouling, It has with my barrels, I saw him run a new barrel in a a championship
match at Te Puke rifle club , fire 10 shots clean at 300 yds repeat at 500 and 600 job done.

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Every new barrel I get has a quick touch up with Autosol, whether brand new or used. The only exception being my Bartlein, which are factory lapped. My rifles all get the Autosol treatment every 200 rounds. An old brush with an Autosol soaked patch wrapped around it is pushed back and forth through the throat area 20 times and 10 times through the remainder less the last couple of inches. I am convinced this slows erosion and it also makes copper removal much easier.

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Originally Posted by Bos

Always a worthwhile exercise knowin where the hole is likely to be though

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totally @Bos ya gotta know where that bullets going to land . . . some shooters seem to struggle with it. Could be helpfull if shooters stop concentrating on getting that great group and look at the POI more. If you draw a vertical line thru the target center of some of the groups you'll see, some will fall at 10 oclock, some at 2 0clock, a few at 12 oclock, others low . . that 1/2 MOA shooter with the little groups is more like 1 MOA or 2MOA.
The British military had a practice i liked when i first saw it . . called something like Dispersion, you measure the bullet holes from the center of the target not the group size . . cant see that being popular tho, shooters would have to be honest about their abilities
If you get into LR Varminting like some of my shooting is you soon realise that tiny groups are meaningless if you cant put those bullets into a small target on demand at longer range. i like using a 1/2 inch square at 100yrds, if you can put those bullets inside the target you've got a real .5MOA setup & you can move out further, if there wide of the mark you have work to do.
its stopped raining so ramble over . . R

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Originally Posted by northdude

Because i have a bottle of brasso here and would have to buy the autosol so brasso would be the inexpesive option here

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You could use tooth paste it is a pretty good polish, All depends the size of the abrasive grit how long it will take to get the desired finish,
I knew a Full bore shooter swore by Jif as a barrel cleared.