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Cleaning and abrasives and Fire Lapping

M
Frank Green said:
Here is another good one for ya....

Back when we did a ton of R&D barrels for Remington for the MSR rifles I get a phone call out of the blue from one of the engineers. They were down in TX doing testing. Also had military guys there from what I remember. Caliber was 338 Lapua if I remember correctly. Might have been 300wm. Anyways both guns are just being hammers with box ammo. Then he tells me... the next day one of the guns just quite shooting. I forget the distance but it was at long range. He said the day before the gun was shooting .7moa or better with box ammo and the next day rounds wouldn't even hit paper. Wild shots going every where! Low round count on the barrel as well. I said, The gun just doesn't quit shooting like that. Some body did something somewhere. I asked the normal questions... same lot of ammo, scope issues, was it cleaned and what and how etc... he said the gun wasn't in they're control/possession the whole time. I said... better start asking questions and digging into it. The other rifle was still pounding nice small groups.

Turned out someone ended up fire lapping the barrel on that one gun! Here's your sign!
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Dang that fired a couple of brain cells in my head

I was once teaching a class of 20 police snipers all with the same 26” REM 700 PSS’s. I took one case of Fed 175’s in 308 and did ten rds in each on chronograph. The average velocity ranged from 2450 to 2650. Guess which guns were slower? The couple DIY fire lapping Not a big sample and was told they shot better after fire lapping but the fire lapping bullets I had bought to try have not been used in twenty years because of it

I understand a true smith doing a touch up on lapping to get final machine marks out because he knows what he is doing but I put DIY lapping barrels with DIY crowning. Don’t do it yourself. Leave to professionals
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Another Original Idea from Hornady

Snuby642
XP1K said:
They seem to be able to make better knockoffs than original product. My brother gave me 100 of the 175 temu smk to try. Causes me great pain to say it, but I think hornady builds a better smk than Sierra.
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They can build a better bullet than the knock off smk's.

I got hold of some of the knock off smk's that were sold to me as Sierra second's . I won't be doing business with that company anymore since they're liars, not a single bullet more.

They were so bad I'm not wasting powder on them, trash 🗑️.

I have had problems with Hornady bullets like their inexpensive 223 bullets, blatantly those suck, measure some for yourself.

As far as making better than Sierra or Berger, I doubt it and Hornady didn't make that claim (wise move). I believe it was implied you (not me) lol couldn't shoot the difference and could use your privios load data.

I'm ordering some more Aeromatch in 223 to QC and test against some Sierra 69g I have.

That will be a good test . I want an honest 500 yard load for my 20" DMR.
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.308 Winchester

Rob01
beetroot said:
Yeah that's how I've always set mine up.
I've only used Redding in the past but can't get a FL bushing die locally (not in the US), but Hornady are available.

Another option would be to remove/grind down the expander ball and then run a mandrel through.
I've never used a mandrel before as typically use a bushing die with good brass (Lapua).
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Yeah the Hornady will work fine. And until I see a problem where I would need a mandrel and an extra step then I am just sticking to my FL bushing dies.
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.308 Winchester

beetroot
Rob01 said:
Hornady bushing dies work well. I use them with my 6ARC. The others work also. I still have some of both and they do the job. With any of them you setting up the shoulder bump and using the right bushing for proper neck tension will be the most important things. Also most come with an expander ball and a thin ball to just hold the depriming pin in. Use the thin ball as you don’t want to set neck tension and then drag a ball back through opening it up.
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Yeah that's how I've always set mine up.
I've only used Redding in the past but can't get a FL bushing die locally (not in the US), but Hornady are available.

Another option would be to remove/grind down the expander ball and then run a mandrel through.
I've never used a mandrel before as typically use a bushing die with good brass (Lapua).
Click to expand...

Maggie’s Motivational Pic Thread v2.0 - - New Rules - See Post #1

F
Fx51LP308 said:
Yodels.... For whatever reason, The "Drakes Cakes" company got much more TV Ad time in my AO in the PRNJ than did the Hostess Company. Drakes was founded in NYC, and I think they had a huge bakery in Wayne, NJ. Therefore, I knew about "Ring Dings" before I'd heard about "Ding Dongs." I knew "Cup Cakes" as the first Hostess product, and then Twinkies. The others came shortly thereafter.
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Better living through chemistry...h that was Dupont. Is there a difference?
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