Well , maybe I could have been a little more definitive about my beef with microgroove.
To assume my ignorance or that I have no microgroove Marlins and have never taken the time to "learn" them highlights the classic definition of the word ass/u/me.
I got a stack of levers, some Marlin ,some Winchester, some Henry.
[highlight=yellow]I do reload for all of them so lets kick that outta the assumption pile also.[/highlight]
Nah, not really,... there are reloaders,... and then there are reloaders. If you reloaded for the micro groove and didn't get any satisfaction, my ASSUMPTION is you either had a bad rifle, or, you didn't do it right. I figure, if I eventually got great results,... anyone can!
Microgroove in 22s ,no problem . [highlight=yellow]Cleaner ? better? I doubt it. ALL 22s shoot well , it's an inherently accurate cartridge. [/highlight]Many completely shot out ,almost smooth bore 22s shoot very well . [highlight=yellow]So in a 22 ,who cares.[/highlight]
Well, I don't own a non micro groove 22, so I really can't say how clean they stay after a few hundred rounds,... all I can state is how my micro groove 22 is as bright and shiny after a range session, as before, with a fresh cleaning.
"WHO CARES?",... really? I care and ASSUME others who are interested in hitting what they aim at are, as well. As to your opinion on 22 rimfire inherent accuracy,... again I have to question you knowledge,.... I went through 5 brands of 22 rimfire before finding the one my rifle liked.
[highlight=yellow]Did the old ads also mention that micro groove barrels were a cheaper, cost cutting measure that they felt shot "as good as " conventional rifling.

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No, never read it was cheaper, but, cheaper doesn't always mean not as good! I know a few expensive pieces that have been out shot by their cheaper clones.... and, after checking a few old Marlin ads, claiming a 20% to 25% increase in accuracy with the micro groove rifling, I have to wonder where you actually get your info,... ALL OF IT!!!.
http://oldadsarefunny.blogspot.com/2012/05/1950s-ad-marlin-model-336.html
My beef is
CENTERFIRE with
CAST bullets .
All my levers shoot jacketed bullets very well .
My non-microgroove levers shoot cast very well.
[highlight=yellow]My Microgroove Marlins shoot huge patterns with cast. [/highlight]
I require my levers, when called upon to do so, to be able to shoot cast.
All I shoot is cast lead bullets. But it takes more than just using any cast bullet. You have to slug your barrel chamber, and cast 2 or 3 thousandths over in micro groove barrels. Lube is as important with over sized cast bullets, as with all cast lead bullets, and maybe even more important than non micro groove barrels, since MORE CONTACT with the bullet is made, in micro groove barrels.
I have a personal blend I would be more than willing to share with you, if interested? I use it in the micro groove Marlin444 cal. and my cast lead bullets for 300BLK,... NEVER ANY LEADING,... JUST AS SHINY FIRST SHOT as the LAST.
Also, being that "velocity" is increased with micro groove barrels, the deviations that can happen between bullet depth, crimp pressure, powder type, case length, primer type, effecting velocity... can have even more effect in reloading for micro groove accuracy that utilizes more pressure than ballard rifling bore that allows gas to escape around a jacketed bullet, imo,... I have found that all of these can effect velocity / accuracy,.... and is something I have found that the micro groove doesn't act kindly to when not reloaded with exacting care! imo!
Next , let me , preemptively say .
[highlight=yellow]I know all interweb wisdom will now point out to cast bullets a couple of thousands larger and the problem goes away. [/highlight]
Tried some . Marginally better but not fixed and still WAY behind jacketed performance.
Anyway I do not cast myself so I require off the shelf bullets to work for me.
In Non-microgroove rifles they do.
Glad you got the "SIZE" info about being a few thousandths over,... but, where you probably failed, as I stated above, YOU MUST SLUG YOUR CHAMBER to know how many thousandths over WHAT, you need ??? Buying commercial over sized cast lead rarely worked for me, especially with their shittty lube, designed to stay intact during shipping, not designed for proper lubrication. imo
And, then, you have to find the right weight and bullet profile for your specific barrel! Like I said, you may have loaded for the micro groove barrel, but that doesn't mean you didn't quit before getting it right.
The weird thing about my micro groove barrel, is,... my chamber, bore and muzzle dimensions are all tighter than the published figures that most folks have trouble with,... BUT, I STILL CAST OVERSIZE as should be done in any rifling type, when shooting cast. Funny thing,... I am waiting (as I write this) for a lube / sizer so I can size down some 45 caliber plated bullets, to my chosen over size diameter, and see what happens from treating plated as my cast.
That's kinda my beef in a nutshell.
But,,,,,So much for my resolve.
As stated I've sworn off and been swapping out microgroove Marlins but what showed up yesterday ???
A Marlin 444s ,,,,,,with microgroove .
[highlight=yellow]Sheeesh, guess it will do ,,,,,,,,till something with Real rifling shows up.

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