Has anyone used David Tubbs Final Finish impregnated bullets to smooth out their Howa Mini factory barrel?
Howa Barrel Break-in
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I have seen a fair number of posts where the barrel break-in takes 150-200 rounds before barrel settles down and shoots consistently. Typical indication of rough barrel (tooling marks, burs, etc.) Unfortunately, I don't own a borescope and I don't want the OCD that develops with owning one. My experience is that majority of factory barrels benefit from lapping to remove the imperfections of mass production. I can accomplish this by either hand lapping or by shooting enough bullets down barrel to smooth out the rough spots.
I was hoping to quickly stabilize barrel performance before making effort to begin load development. Thought Tubb's bullets might be the new better mouse trap then spending hot afternoon at shooting bench with plinking rounds, cleaning solvent and J-B paste.Last edited by Oso Polaris; 07-26-2020, 04:48 PM.
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Originally posted by Klem View PostOso,
How does it group?
With our ammo/reloading supply shortage, I hate idea of waste 100-200 bullets just to get gun broken-in like I read about in some of the posts.Last edited by Oso Polaris; 07-26-2020, 11:19 PM.
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Originally posted by Oso Polaris View PostI have seen a fair number of posts where the barrel break-in takes 150-200 rounds before barrel settles down and shoots consistently. Typical indication of rough barrel (tooling marks, burs, etc.) Unfortunately, I don't own a borescope and I don't want the OCD that develops with owning one. My experience is that majority of factory barrels benefit from lapping to remove the imperfections of mass production. I can accomplish this by either hand lapping or by shooting enough bullets down barrel to smooth out the rough spots.
I was hoping to quickly stabilize barrel performance before making effort to begin load development. Thought Tubb's bullets might be the new better mouse trap then spending hot afternoon at shooting bench with plinking rounds, cleaning solvent and J-B paste.
Safe the brass for reloads, go home clean bore and chamber, your ready to work up sub moa groups now.
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Oso,
Yes, don't fix something that may not be broken. Shoot a few groups first and then make a decision.
Normal shooting is going to do that anyway. It may take a few more rounds to fill in all the micropores with copper and smooth out the machining marks but it will all get there eventually.
(I wonder if Tubbs uses these bullets on his own barrels).
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That was going to be my question, have you shot it yet? My mini Grendel and two others I am familiar with shoot sub MOA with no regimented breakl-procedure. Cleaned the bores fired a couple of shots cleaned again and then fired away. Honestly even with the factory 123 sst we could see these guns were shooters within the first 40 rounds. A little load developement and we've each got several loads that are MOA or below, very accurate for the hunting they will do. Note we are not trying to make benchrest rifles out of these Mini's, that's not what they were designed to do.
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