I received an order of Rainier 45ACP 200g TCJ RN bullets. I realize these are plated and the mfgr recommends use a load for lead bullets, so I plan on using the load data from Hodgen, I will be loading with W231. The gun they will be used in is a Kimber Custom Classic Target.
200 GR. CAST LSWC Winchester 231 .451" 1.225" 4.4 771 11,000 CUP 5.6 914 16,900 CUP
My issue is trying to find the right OAL/COAL for this load using the RN bullets. I have not been able to find one anywhere. I am aware of the perils of reducing the OAL too much and the impact increased pressure. It would be nice if more information were provided by some of the site/manuals. I just subscribed to loaddata.com, and rather disappointed in the general lack of OAL (at least for the 9mm and 45ACP loads).
I have tried Lyman, Speer, Sierra, Hornady, Loaddata.com (they dont list COALs at all), Handloaders.com, Hodgon/Winchester load center. I thought the 200g would be a good and economical target/practice load.
Since I know my COAL of 1.260 feeds and ejects well in my Kimber
I have been using 1.260 OAL for my 45ACP 200g FMJ-RN loads in my Kimber, with 6.1g of Power Pistol and 6.5g of WSF, with extremely accurate results. I've read W231 meters better, and is a little cleaner, so I want to try it.
So, not being able to find a COAL/OAL, and fearing the present OAL I was using might be a little long, I set out doing a lot of research and taking several measurements.
I measured the length of 10 Rocky Mountain Bullets FMJ-RN ENC (jackets) and 10 bullets from Rainier TCJ-RN (plated), both 200g. I then averaged the 10 measurements of each.
RMR avg length = .5619"
Rainier avg length = .5986"
The Rainier bullets on average are .0367" longer than the RMR bullets.
The COL used with the RMR bullets (with good results) was 1.260 (though I fear a little long). This means the seating depth with the RMR bullets should have been approx .6981". Adding this to the avg length of the Rainier plated bullets, yields a OAL of 1.2967". Longer than the max of 1.275 Oviously I cant use this OAL
Searching for COALs for my 200g bullets, I found an interesting post on 1911forum.com.
http://forums.1911forum.com/showthread.php?p=2394680 Post #3, also #30 on page 2.
Not all 200gr SWC's are created equal. When initially setting up, I load dummy rounds and drop them in the barrel (removed from pistol) and seat the bullet until the case head is flush with the barrel hood. If you change brands of bullets, you should to do this again. Actually, this advice would apply to any bullet you may want to load. You just can't take published COAL's as gospel. I load my Lyman 452630 200gr SWC's to a COAL of 1.24 for my D.W. CBOB. I could load this same bullet to 1.25" in my Springfield's.
So I set off to take more measurements.
First off, I measured some of the rounds I had already made with a COAL of 1.260, by placing the round in the clean barrel of my Kimber (after it's been field stripped), and measuring whether the headstamp was above or below the barrel hood, and by how much. These bullets were 200g FMJ-RN from Rocky Mountain Reloading (RMR).
The rounds I had made were above the hood by approx .0125" It also tended to stick in the chamber, so I know the headspace was not on the case mouth as it should be.
Then I took an empty case and ran it through all the resizing dies, including the FCD. I placed it in the barrel, and it was .0250" below the hood. I know the empty case headspaced on the mouth as it should, and now I have a measurement to work from.
Next I made a dummy round using a 200g FMJ-RN from RMR (plated). I started with the COAL at 1.260 and measured the distance between the headstamp and the barrel hood. Below are the numbers:
COAL
1.260 above hood by .0125
1.250 below hood by .0005
1.240 below hood by .0175
1.230 below hood by .0175
1.220 below hood by .0175
1.210 below hood by .0175
So, it looks like for the bullet above, the optimum COAL is approx 1.235. This should allow for deviations in case length, bullet length, bullet jump, etc.
I did the same thing using 200g TCJ-RN from Rainier (plated). Below are the numbers:
Empty case was .0190" below barrel hood.
After seating bullet:
COAL
1.260 above hood by .0145 **
1.250 below hood by .0175
1.240 below hood by .0175
1.235 below hood by .0175
1.200 below hood by .0175
** This COAL felt like the case was headspacing like it should, it did not stick in the chamber. So there must be a difference in the shape of the RN bullet between the two mfgrs.
So, I think it looks like a OAL/COAL of 1.235 would also be good with a 200g from either mfgr. I'm very interested in any feedback, if I've gone about this wrong, I certainly want to know. The loads I use are typically at the mid range, or slightly below, or high pressure shouldnt be an issue.
I also indend to double-check my 9mm loads against the same process, and see how they fare.
