R P Brass

[JO JO]

i am having an issue, loading R P brass once fired with 155gr xtp, 40 s&w
I am decapping/resizing not even belling the case then loading, set OAL.
the issue is theres not enough neck tension I can push bullet in by hand
pressure a good hard squeeze and in it goes ? loaded round is at .420 at
mouth loaded ? have tryed to resize no flare and same thing on about 50%
of 50 loaded rounds, useing hornady die set. did not notice this issue
with starline brass,
anyone run into this before ?

 

[joustin]

Yep. RP brass tends to run thin. I use them for cast in my 45

Sent from my Kindle Fire using Tapatalk 2

 

[rg1]

I had the same issue with my 10mm/40sw sizing die not sizing enough for good bullet tension. I called my die manufacturer and they sent me a new sizing die that does work with all brass makes. I wouldn't try shooting any until you have solved the loose bullet problem. Bullet set backs can raise pressures to unsafe levels. If your expanding die doesn't do any expanding and you can't feel the expander working then you have a maximum sized sizing die carbide ring and minimum sized brass. Sounds like you need another sizing die with tighter dimensions. I'd call customer support of your die manufacturer. Your sizing die should work with all brass even RP and others with thinner walls.

 

[kingmt]

I agree you need to call the manufacture. I would try to walk you through it but I don't have a 40 or a Hornady die. This isn't the first time I have heard this tho.

 

[wmurphy]

Had the same problem with Win. .45 ACP. Was using RCBS die, then changed to Dillon and the problem went away.

 

[NeuseRvrRat]

R-P pistol brass = scrap

 

[kingmt]

Scrap them my direction. I like them.

Also shocked to here that about a RCBS die. What I don't like about my RCBS dies is that they oversize.

 

[PCCUSNRET]

Had the same problem with Win. .45 ACP. Was using RCBS die, then changed to Dillon and the problem went away.

Did you contact RCBS? I just used RCBS dies to load 25 rounds of 45acp with R.P. brass and they did just fine. I used Sierra 185 gr. HP's and the only way these bullets are moving is if they are fired or with a bullet puller. I can see the outline of the bottom of the bullet in each of these reloads. I cycled a couple of them a dozen times each in two different 1911's and there was no movement. I would have contacted RCBS and if need be send them the dies and some cases.

 

[PCCUSNRET]

Also shocked to here that about a RCBS die. What I don't like about my RCBS dies is that they oversize.

Me too! With my 9mm RCBS dies my reloads have a hourglass shape. Don't have to worry about bullet movement, but very odd looking bullets.

 

[Walkalong]

Call RCBS, and they will replace it with a slightly tighter sizer. Or just don't use RP brass, but RP brass works just fine, if you size it down enough.

 

[kingmt]

OP
You did check that the bullets were .400"?

 

[wmurphy]

No, I didn't contact RCBS but probably will eventually. Just happen to get my hands on the Dillon die. Not saying RCBS is bad, just listed my experience to show it may not be related to the brand of brass. I was having this problem with Berry's plated bullets that measured .452

 

[JO JO]

bullets are Hornady XTP 155 Gr #40000 .400 dia
Hornady die set used
expander not used and loaded round at brass to bullet end .420 dia
bullet can be pushed into r-p case to well below min oal. I think bullet is
bottoming out on powder,

 

[ImjinScout]

I load a lot of .40S&W and using range brass I have run across quite a few RP brass, but I have not had any problems like you are describing. I also use all Hornady die sets and load Berry's bullets. Now for my crimp diameter I usually crimp to about .422, not sure what the problem is though,

 

[Waywatcher]

I'm having acceptable results with my RCBS .40 dies sizing R-P to correct specifications. I get about 2 thousandths case swell comparing before-bullet-seat to after-bullet-seat diameter. (0.418 to 0.420 IIRC.) And I couldn't budge the bullet using about 25lbs of pressure against a solid bench. I made three dummy rounds to try this out and all were this way. Ever-so-slightly hourglassed shaped.

 

[gahunter12]

Had the same problem with Win. .45 ACP. Was using RCBS die, then changed to Dillon and the problem went away.

I have never had a problem with my Dillon dies in 40s&w, or 45acp. I have 1000 or so 40s&w, and about 500 45acp. I always get a nice bottle neck.

 

[joustin]

If starline is working well then the RP brass is the issue. Why get a larger expander and potentially over work brass that is in spec?

Sent from my Kindle Fire using Tapatalk 2

 

[rg1]

My 10mm/40sw die set was Hornady. I called them with my inadequate sizing problem and they sent a new sizer die in about 3 days free of charge. I'd contact them. The new die works fine on all 40 brass.

 

[JO JO]

just checked some more measurments, resized no bullet .418, compared these R-P to
starline 40 s&w brass the starline is .003 thicker. Loaded a dummy round with the starline
and XTP could not push the bullet in for the life of me only thing I changed was the brass.
I guess the XTP .400 not like berrys at .401 and R-P .003 thinner brass could of been a
bad day at the range, maybe I got some bad R-P brass ? It was rem green box ammo
I fired once and saved brass to load. This reminds me its worth the extra time to check
and recheck, now of to pull some bullets atleast just a 50 round batch.

 

[1SOW]

I havent measured the thickness, but 9mm R&P is stiffer/harder tha ATK brass (FC, Speer,CCI +). The 9mm R&P works fine and seats primers easier than most with the bigger bevel.

I suspect your die is limited to what it will size properly.
How many rds did you load with a 50% sizing problem?

 

[JO JO]

talked to hornady today and measured ID of die = good die, he said that with the R-P
brass at .002-.003 thiner at the case wall at one spot would mean that overall it would
be closer to .005-.006 thiner inside brass= I guess R-P had some bad brass out there

 

[kingmt]

Oh. Forgot to tell you it is never Hornady's fault.

How thick is your brass?

 

[joneb]

Does the expander/flare die increase the diameter of the case below the flare ?

 

[zeke]

Rem 45 and 40 brass is thinner than most, the 9mm is thicker than most. Lee sells a .40 undersize die. Combine it with an appropriate expanding plug and it will help.

 

[ArchAngelCD]

I have never had problems with Remington brass when sizing them with Lee dies. Are you sure it's not your sizing die that's at fault? I know you said there were no problems with Starline brass but I find it hard to believe any commercial brass will have such problems.

Hey, anything is possible...