I just heard from Dillon about my problem, of insufficiant tension to hold the bullet in the case under recoil from my 625 Mountain gun, 10.5 gr. HS-6 Powder 250GR LRNFP Bullet.To start with they have replaced the Resizing die, the Powder funnel/ Expander Die, the crimp die, none of these things cured the problem, as there was no increase in the Dementions to do anything to the case bullet tension.
It was desided to go ahead and change the 45 Colt resizing Die for the 45 ACP resizing Die and just not tell the Machine it is Resizing with the wrong Sizeing Die, so to make a long story short that is the game plan at this point in time, now all I need to do is get me a Good Chronograph so I can start working up loads to get back to where I think I should be with the HS-6 Powder and to confirm that the load can be handeled in the Mountain Gun.

The lubrication on cast bullets makes it hard to achieve stiff bullet pull. Two things to consider: If your bullet has no crimp groove, get one that does. Use brass with the thickest mouth brass you can get; in .45 ACP Remington cases used to have thin case mouths that work-hardened quickly and couldn't be sized small enough to hold any bullet well; I haven't even bothered to try reloading them for years. I don't know if they still have that issue? Try Starline or Top Brass. Winchester may be OK, too. Use a Lee factory crimp die. You can set one up in a cheap single-stage press like the Lee Challenger as an extra loading step. Use a bullet with a copper gas check and wipe all traces of lube off the gas check before seating.

I am assuming jacketed bullets present no problem?

Nick

The lubrication on cast bullets makes it hard to achieve stiff bullet pull. Two things to consider: If your bullet has no crimp groove, get one that does. Use brass with the thickest mouth brass you can get; in .45 ACP Remington cases used to have thin case mouths that work-hardened quickly and couldn't be sized small enough to hold any bullet well; I haven't even bothered to try reloading them for years. I don't know if they still have that issue? Try Starline or Top Brass. Winchester may be OK, too. Use a Lee factory crimp die. You can set one up in a cheap single-stage press like the Lee Challenger as an extra loading step. Use a bullet with a copper gas check and wipe all traces of lube off the gas check before seating.

I am assuming jacketed bullets present no problem?

Nick
UncleNick, My bullets do have a crimp groove and the brass I plan on using will most likely be Magtech, as I am going to buy some to start working up my load along with the Magtech Primers, I am thinking of using a 255 or 260 GR SWC Bullet over Clays Universal Powder to start as it has a wide range of load listings, My press is A Dillon Square Deal "B" and if the resizing operation using the 45 ACP die for the 45 Colt round works as I expect it to I won't need a second press that I can not afford right now, my first priority is a good Chronograph to work my loads up with and then see what may or may not need to be done next, I haven't ruled out a GC Bullet as yet, it is another consideration, and I must be Honest here I personally don't like Lee Loading Equiptment, I know a lot of you guys do and that is fine with me but not for me, and please don't ask why as I will not get into it, just accept that I don't like Lee.

. . . My bullets do have a crimp groove and the brass I plan on using will most likely be Magtech. . .

I've never measured any Magtech cases. I have a ball-anvil thimble micrometer I use for case necks. It tells me the piece of Federal brass I grabbed is .0117" to .0123" around the neck. The piece of TopBrass I grabbed is an astonishingly uniform .0119" to .0120" going around the neck. In either case, 12 mils is nominal, so that should give you something to compare to.

. . . My press is A Dillon Square Deal "B". . .

That's what I use for .45 ACP. Great press, though it restricts you to Dillon as your die maker.

. . . I personally don't like Lee Loading Equipment, I know a lot of you guys do and that is fine with me but not for me, and please don't ask why as I will not get into it, just accept that I don't like Lee.

Sorry you had a bad experience with Lee. Random probability says that sooner or later someone will have trouble or even a series of troubles with every manufacturer out there. As you surmise, my experience with Lee has been good. I was thinking that for $20 a second operation press might be justified? I always keep a Lee hand press in my range kit for seating bullets during load development, and would use that if I were in your shoes.

The reason I thought of Lee's Factory Crimp die is that in pistol calibers this die has a built-in carbide sizing ring to squeeze the round down to size after seating. That might add some bullet retaining pressure? In your case, perhaps you could try, after loading, putting the .45 LC die back in the SD B using a short bolt in place of the one with the decapping rod, then run your finished rounds in just past the bullet and out again? A lot of bother if you have to make or modify a bolt.

That light gun is always going to subject your bullets to sharp recoil, and the heavier the bullets are, the more inertia they'll have, so the more strength will be required of the crimp to accelerate them rearward to join in the recoiling motion of the rest of the gun. So, in addition to getting a better case grip on the bullet, anything you can do to cut recoil will help. If you haven't already done so, try the venerated Weaver hold with the front and rear hands pressing in opposition to pre-load a counterforce to the recoil. Mag-na-porting (http://www.magnaport.com/misc.html) might help by reducing flipping so recoil is focused straight to the rear where your body mass is more directly behind it?

After that, the only other things that come to mind are gluing the bullets into place with pitch, the way the military does (though you will have to be sure there is no lube in the crimp groove to make that work). Going to a drier and stickier lube, such as the old NRA 50:50 Alox and beeswax formula dissolved in mineral sprits to coat the bullet, then allowed to dry. I hate to mention that Lee makes this pre-bottled as their Tumble Lube product. After drying a month or so it isn't very tacky or greasy any longer and is slightly sticky. You might have to go to poly-wads or gas checks to prevent leading if you use a less effective lube than your bullets already have.

Good luck with it,
Nick