DJ:
#1..With rimless cases, you would be right, Mac. For rimmed cases you are wrong. The rim and the rim recess control the initial fireforming and the shoulder has nothing to do with it. #2..It's perfectly safe to fire factory ammo in the recut chamber as long as the original rimcut was within tolerances in the first place and was not deepened in the rechamber. You ain't gonna get no "case head expansion" with reasonable fireformining load. All you'll do is move the shoulder forward and expand the case body. You won't even affect case life significantly if you set up your dies properly.
Rimless cases are a different story, one I'm not going into at this time.
#3,4,5 ..(3)It's also important to remember that we are talking about Handis, not benchrest rifles. MOA is the best we can hope for and a distant dream for many of us.(#4)A perfect chamber would be nice, but we ain't ever gonna get one. A careful hand ream job is plenty good enough for what we are working with. #5...It's likely to be better than some of the work I have seen come out of factories and military arsenals.
#1..Nope we will disagree here..If a chamber is cut to the correct specs for a Ackley Improved cartridge...then you will have .004" crush fit at the shoulder neck junction to fireform against.This is the way Parker designed
His Improved Cartridges to work...this is why he said the barrels need to be set back to get this to happen...this is why you can use full factory cartridges to fireform your brass with in ...now get this...
ANY of
HIS cartridges( I'm not portraying shouting...the bolds are just of emphasis only)....all the rest of the cartridges that folks are calling Ackley Improved are not Ackley's
design..read what he had to say on this...he's written many articles on it...not just only what in volume 1&2
#2...Nope...I wouldn't want to fire full factory loads if the shoulder is as far away as those in the pics Quickdtoo posted..I sure as heck wouldn't want to use them...not with that amount of case stretch...and with the amount of case head expansion that will take place...I don't reload like that...and most of the folks who do are taking big chances of case separations...or split cases..and I have found only 1 person who would cut a chamber this way...call up some of the better know gunsmiths around the country my friend...and ask them...You then say this DJ.."
You ain't gonna get no "case head expansion" with reasonable fireformining load. All you'll do is move the shoulder forward and expand the case body. You won't even affect case life significantly if you set up your dies properly. "...If you have a true Ackley improved...not just a improved 30-30...you can fireform with full power factory loads..not just reasonable fireforming loads...and this is my point here...I know how to set up dies properly for improved chambers..or for anyother cartridge I load for..and in a Handi rifle it is quite simple to do...
I have never said you can't hand load for a
Improved cartridge in a Handi...look back on the subject...and by the way... doing a rimless cartridge isn't that difficult either as long as you know
how to....and as long as the chamber is cut properly...and as long as the dies dimensions match the chamber specs..What I have said is you can't cut a Handi 30-30 chamber to a 30-30 Ackley Improved......The amount of misinformation on the subject is unreal..and folks want to call cartridges AI's when they aren't...what is so difficult to understanding about that...?
#3...Sorry...I respectfully disagree with you...here's why...I treat every rifle like a bench rest rifle...I hand polish/lap the chamber and bore..I disassemble the rifle completely degrease the action/barrel and remove any burrs that may be present..I remove the scope rail and completely degrease the screw holes and re-locktite the complete base and screws back down.I don't use cheap rings...and I certainly won't use anymore cheap scopes and those that need it..get lapped..others use Burris Signatures..I then start my handload process...I handload for accuracy,consistency,and I load safely working up in sane incriments...I normally don't take short cuts needlessly...and I take utmost care to craft the most accurate ammo possible..If I rush this process...my groups will suffer....Perhaps this is why every Handi rifle...save but 1... I have ever owned has shot well under MOA... Yes...I can be a-little obsesive about it...but I never have to worry about my ammunition being at fault when the groups go crazy...
#4..Yes and no...some of the chambers I have had...especially the one in my 30-06 Ultra-Comp...and my 243 Ultra Varmint 24" barrels...were extremely good..my 30-06UC was under 1/4"...and from what mitchell has told me the 243 is the same...both of these barrels I lapped...but both chambers were concentric..
#5 I too have seen some real sloppy bores and chambers on some military rifles...and I have seen some sloppy chambers on a few friends handi's...but most of them are older models...most of the new ones are concentric...just chambered with excessive throat/leade dimensions...so...to me...I can't and won't accept doing this by hand.....nor can I recommend doing it this way... on a good chamber.......and I know of no-one who has the dexterity to gauge a few thousandths difference by hand...let alone .006"-.010" as some folks have gotten ...
I know some folks don't agree...even a few so-called experts that
should know better..but most of the real gunsmiths I know tell a different story...and here's something even those that disagree can't get around...PO Ackley agreed as well and wrote about...funny isn't it...
Take Care my Friend
Mac