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Old May 31, 1999, 10:39 AM   #1
Patrick Graham
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Well, it's the memorial day weekend again. Time to drag out the old Chrony and see what the velocities are on some of my favorite reloads. I also posted the same info on AR15.com.

223 data - using Bushmaster 1 in 9 20", all LC brass with WSR primer.

25.4 gr Varget, Serria 69 gr Match
2778fps, 2741fps, 2787fps.

26.4 Varget, IMI 62 gr lead core.
2863fps, 2882fps, 2909fps.
(Interesting note on Mil Spec 62/63gr loads. Out of a pre-ban Colt 1 in 7, 20".. Canadian SS109 ammo did about 3100fps + or - 30fps.. Toasty)

30-06 Data from 1943 Springfield Garand All IMI cases with WLR primers.

46.8 gr Varget, 168 gr Serria Boat Tail.
2476fps, 2535fps, 2454fps,

43.8 gr AA2230-C, 173 gr FMJ Match (pulled).
2575fps, 2414fps, 2430fps. (most accurate 30-06 load of the two)

.45 Data from Colt 1991A1 All commerical cases and WLP primers.

230 gr FMJ, 5.3 gr WW231. *Too Hot*
1168fps, 1166fps, 1176fps
I have a very heavy crimp on this, it could account for some of the velocity.
I'm glad I had a slam pad with an 18.5lb recoil spring. I backed that puppy right back down to 5.0 grains - may have to go down even further.




[This message has been edited by Patrick Graham (edited May 31, 1999).]
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Old May 31, 1999, 01:02 PM   #2
Mal H
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Thanks Patrick, This is good data to keep in the old reloading file. I wonder what is causing your excessive vel. with the 45's. That amount of W231 should yield velocities in the mid 700's for a 5" barrel. What do you mean by heavy crimp? I assume you're using a taper crimp, but are you crimping too far down the casing? Who makes the 230 FMJ you are using?
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Old May 31, 1999, 02:50 PM   #3
zot
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yes I'm the one who tried .45 super, and I'm
sure now its not a load that the 1911 would
handle for long, anyway I load Winchester 231
5.7 grains with Win 230 gr. FMJ, I use a 22lb
Wolf spring with recoil buff pads, full length guide rod, Speer reload manual says
6.2 gr.MAX with 231, also Winchesters manual
says 5.7 gr. is MAX, I tried 6.2 but the cases split at the rim, need Kart ramped barrel for heavier loads, I get 800 FPS with
5.7 gr. 231, and only use a crimp that pushes
case back against bullet, no real crimp, the
bullet is held by case not crimp, are your
reloads going into chamber too far?
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Old May 31, 1999, 09:42 PM   #4
Grayfox
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Patrick,
check your overall lenght on those .45acp loads. You may have the bullet seated too deep causing the higher velocity.
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Old June 2, 1999, 09:12 PM   #5
Patrick Graham
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Well, the plop thickens..

My 45 reloads have a case width at the top of the neck of .471", my OAL is 1.271"

New Federal 45 ammo is .473" wide at the top of the neck and has an OAL of 1.266"

I'm still thinking it's the crimp because I had the taper crimp torqued way down.
I didn't think a person could over do a taper crimp on a straight wall case.
I'll bet that was a "wrong" assumption. :-)

If I truly have overcrimped then that explains a little "pressure" problem I've been having with my .357 loads. Good thing I've been shooting those loads out of a GP100.

[This message has been edited by Patrick Graham (edited June 02, 1999).]
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Old June 2, 1999, 10:15 PM   #6
Mal H
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Patrick, I think you are narrowing it down to the crimp. Your dimensions are within specs. My .45 ACP 230 FMJ reloads are .470 at mouth and 1.270 OAL. 1.275 OAL is nominal. IMO, the taper crimp should be no more than .050" down the case. I crimp only enough to remove the bell from the expander, around .030". Also, you might seat the bullet and crimp in 2 separate operations, if you aren't doing that now. Try a few rounds and see if this makes a difference. You might be crimping while the bullet is moving and gouging the bullet. That is only a guess.

For .357 revolver loads, a rolled crimp is preferred. Usually, a heavy crimp won't hurt for these loads.

One other thought, we are going on the assumption that your chrono is accurate, maybe you are blaming the wrong component. Although the rifle loads don't seem to be out of line. Have you chrono'ed a factory .45?
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