Load Data - .451 185gr XTP?

[Foto Joe]

I picked up a box of .451 185gr JHP XTP's yesterday just for grins and because I actually found JHP's.

Hodgdon doesn't specifically list the JHP XTP in 185 but lists a JSWC instead. Bullet depth of course will be different so using the COL data is not a good plan. I've seated the dummy rounds at 1.240 instead of the 1.135 that the JSWC data calls for.

Since I'll be loading these for self defense rounds I'll be more than likely running them up to around max but the problem I have is that my COL is going to be more than the JSWC data thereby corrupting the data. Anybody out there got a Hornady book that they can give me the data from? I'm on the road for the winter and not all my books came along with me since I didn't plan on experimenting.

 

[7mmb]

Hornady's 9th Edition lists a COL of 1.213" for the 185gr HP XTP. What powder are you using? The Hodgdon powders they have paired with that bullet are Titegroup, HP-38, Longshot and HS-6. I've loaded Hornady's 200gr XTPs seated to their recommended COL of 1.210". They worked great in my Ruger P90 and Witness Elite Match but when I got my Witness P Carry the rounds were too long for its chamber and a round got stuck in the rifling which was a PITA to fix. Do the plunk test in your pistol to make sure they will work at Hornady's COL. Chances are you will be fine but you can never be too careful.

 

[ljnowell]

I have loaded lots of those and IMO Power Pistol is your friend. Its a great powder for JHP 45acp loads

 

[Foto Joe]

7mmb,

Apparently I neglected to mention that I'm using AutoComp, sorry about that. I've got AutoComp and 700X available and I prefer the AutoComp. I did get the COL pretty close though, I'm set at 1.218". Can you tell me what Hornady's 9th Edition says for AutoComp and the 185 XTP-JHP's?

I went out and test fired two different loads yesterday for group through my chronograph. The first was 7.0gr AutoComp and the second was 7.3gr AutoComp. I had some gas blow back issues on both that I started another thread on: http://www.thehighroad.org/showthread.php?p=9216105

 

[ljnowell]

If you arent dead set on highest velocity possible the 700x would definitely give you a clean accurate load. It will sacrifice on the very top end some velocity. It would still be adequate though. Hodgdon lists 5.5gr at 959fps.

 

[Reloadron]

Can you tell me what Hornady's 9th Edition says for AutoComp and the 185 XTP-JHP's?

It says nothing as Auto Comp isn't listed, neither is 700X listed for the 45 ACP.

Ron

 

[7mmb]

Hornady's data with their 185gr JSWC and HP XTP are the same. I would just use Hodgdon's data for the JSWC with Hornady's COL for the XTP. Since you are loading .005" longer you would have very slightly more leeway and should be perfectly safe. With the Hodgdon powders that Hornady has data for Hornady's data is hotter than Hodgdon's, in some cases nearly a grain higher. Of course, Hodgdon is likely loading for target work with the JSWC, not SD work like Hornady would be with the XTP. Bottom line is Hodgdon's data will be perfectly safe and on the conservative side.

Your AutoComp loads are light, considering your velocities and gas blow back. AutoComp should be able to deliver the velocity you're after, unfortunately published data does not exist for it. If you want top speeds with your bullets and still use published data you will need to switch to Power Pistol, SR-4756 or Longshot and use Hornady's data. I think you would likely be safe going above Hodgdon's max by a half grain or so, but without pressure testing equipment there is no way to know for sure.

 

[Foto Joe]

7mmb,

Thanks for your input, I appreciate it. I think what I'll do is run up a dozen at the published max, drop my COL to spec and try them again. I'll probably call that good until I can get my hands on some Power Pistol. I'll post the results and we'll see what we come up with.

 

[CatManDo]

I assume you already have this load info, but here it is again:
185 GR. HDY JSWC Winchester AutoComp .451" 1.135" 6.7 856 12,600 CUP 7.4 958 16,200 CUP

 

[Foto Joe]

Yup, that's what I've been using for the XTP-JHP's and 7mmb pointed out that Hornady's data is identical for JSWC & JHP's.