Missouri 45ACP 250 GR HELP.

[C10trucker]

My first time be nice. Ha HA.

I have a Kimber Stainless II, 5 in. barrel. I want to load the 250 GR Pin Buster but I have to seat the bullet very low, lower than posts I have read. OAL would be 1.155 this gives me approx. .005 to .006 clearance from the rifling. This is approx .100 deeper than I load the 230 GR FMJ. I have no idea how to safely start to load this or with what powder at this depth. The only reloading supplies I have on hand right now are Accurate #2 and Winchester large pistol primers. I will be picking up more supplies in 2 weeks. Can anyone make a suggestion?

 

[Landric]

I've loaded Missouri Bullet's 250 grain .45 Colt Cowboy #1 bullet in .45 ACP but not their Pin Buster, so I have no idea if the bullets have the same dimensions. That said, I got safe loads (no over pressure signs) with the following:

-4.0 grains Trail Boss/Remington LP primer, 693 fps Ave.

-6.5 grains of HS-6/Remington LP primer, 670 fps Ave.

-6.7 grains of AA#5/Remington LP primer, 798 fps Ave.

I am sure you could extrapolate a load with AA#2, but I wouldn't hazard a guess as to what it would be, and I don't have any of my load manuals in front of me.

 

[Walkalong]

I used to shoot 250 Gr bullets in .45 ACP using 5.0 Grs of W-231. I was loading them at 1.215 O.A.L..

I have shot a lot of AA #2 and W-231 and feel comfortable in saying I would start at 4.7 Grs of AA #2 and work up. 4.7 Grs is going to be light. It might break 650 FPS. Be interested to know if you try it.

 

[MissouriBullet]

My first time be nice. Ha HA.

I have a Kimber Stainless II, 5 in. barrel. I want to load the 250 GR Pin Buster but I have to seat the bullet very low, lower than posts I have read. OAL would be 1.155 this gives me approx. .005 to .006 clearance from the rifling. This is approx .100 deeper than I load the 230 GR FMJ. I have no idea how to safely start to load this or with what powder at this depth. The only reloading supplies I have on hand right now are Accurate #2 and Winchester large pistol primers. I will be picking up more supplies in 2 weeks. Can anyone make a suggestion?

A fundamental question that should be addressed is as to whether the Kimber has a standard chamber. The reason I bring this up is that I load that bullet to 1.187 and it is dead-bang reliable in a mix of my 1911's. I don't have a Kimber to test with, but I have to think that if they have standard (ie, same as Springfield, Colt's, et al.) chamber dimensions then they shouldn't require especially deep seating to function correctly.

Curious!

Brad

 

[C10trucker]

Missouri Pin Buster & Kimber Chamber Length

Brad, I think that is the question that needs to be answered I will attempt to use my caliper's depth gauge to get a ball park on the chambers length. Can anyone tell me what the standard 1911's is off the top of there head.

Anyone else please read the original post and add your 2 cents.

*
It's easy knowing right from wrong, the hard part is doing the right thing all the time.
*

 

[C10trucker]

Kimber Chamber Depth

I measured the depth from the flat spots on both sides of the bullet peep hole and that was .738, measured from the flats at the top of the peep hole I get approx .900, sorry if I don't know what every section of the barrel is called.

 

[Walkalong]

http://www.thehighroad.org/showthread.php?t=506678

Try this.

 

[C10trucker]

Auwsum info for me anyway, A newbe

Check this out, it's a great PDF at this sight. I found blue prints but this is much nicer.

http://www.m1911.org/technic.htm

Collection of M1911-A1 drawings (courtesy of Rio Benson)

 

[Walkalong]

Yep, lots of good stuff there.

 

[C10trucker]

Thanks Walkalong

That was a nice presentation and my Pin Buster bullet is .006 below flush with a case mouth of .470 and chambers and ejects with no problem at this point in the experiment anyway.

From all the info I have gathered and compared to my 45, I believe this is just the way it's going to be with this Kimber. I have no problem shooting the bullet with this low 1.155 OAL and .005 clearance to the rifling, configuration. I'm just leary about the powder charge. So I guess I just have to figure out how to get to that point.

I'm still listening if anyone has anything more on the subject.

Thanks

 

[MCMXI]

Walkalong, that is an EXCELLENT thread you put together there ... it should be a sticky for sure. I have a very good load for my Kimber but with your thread I should be able to achieve the BEST load for my Kimber.

Thanks.