RMR .357 158 Gr. FMJ Round Nose Flat Point Bullets

[Waterboy3313]

I just ordered and received another 1000 of these above mentioned bullets. Like always RMR has been awesome. I've been loading them with titegroup and shooting them through a 6 inch Ruger GP100. For paper punching they have been really great. I ended up buying a taper crimp die for them and have been very pleased.

Today while being stuck in the house due to bad weather I managed to locate some H110 while searching online for reloading components. I can't remember what I based my load data off of when I started my work up for the titegroup loads using this bullet. I think I might have started a bit below the minimum published load data from the hodgdon site for titegroup and the Hornady XTP bullet.

I'm trying to find published load data for a similar bullet using H110. Does anyone know of a bullet that would be good reference to start a safe work up? Any advice is greatly appreciated.

 

[dcloco]

You can call or email Hodgdon as well.

Info from Hodgdon website:


BULLET WEIGHT
158 GR. HDY XTP
CASE
WINCHESTER
PRIMER
WINCHESTER SPM, SMALL PISTOL MAGNUM

Starting Load Maximum Loads
Manufacturer Powder Bullet Diam. C.O.L Grs. Vel. (ft/s) Pressure Grs. Vel. (ft/s) Pressure
Hodgdon H110 OUT OF STOCK 0.357" 1.580" 15.0 1,418 28,600 CUP 16.7 1,591 40,700 CUP

 

[Alaskamike]

The biggest problem you'll run into is that those bullets don't have a crimp groove. If you use them for hotter loads they will likely pull out of the cases under recoil and lock up your revolver.

I would recommend you stick to midrange or lighter loads with them.

 

[Waterboy3313]

The biggest problem you'll run into is that those bullets don't have a crimp groove. If you use them for hotter loads they will likely pull out of the cases under recoil and lock up your revolver

That was also on my mind. I bought a taper crimp die when I ordered the first batch. I've never had a problem using titegroup but stepping up to H110 has a lot of what ifs racing through my mind. This revolver has never seen factory ammo or a full Magnum round. I was and still hoping a heavy taper crimp would work.

 

[joneb]

The biggest problem you'll run into is that those bullets don't have a crimp groove. If you use them for hotter loads they will likely pull out of the cases under recoil and lock up your revolver.

This will solve that issue,https://leeprecision.com/357-magnum-custom-collet-style-crimp-die.html
This is not a Lee FCD

 

[Waterboy3313]

LOL another 357 die to add to my collection.

The video says it's a factory crimp die. Out of the 4 different sets of 357 dies I have I am thinking this has to be the only style die I do not have.

 

[Alaskamike]

That was also on my mind. I bought a taper crimp die when I ordered the first batch. I've never had a problem using titegroup but stepping up to H110 has a lot of what ifs racing through my mind. This revolver has never seen factory ammo or a full Magnum round. I was and still hoping a heavy taper crimp would work.

I think it will mainly depend on the diameter of the bullets, and how much your sizing die squeezes down the brass. Seating them more deeply should also help.

Ultimately it may come down to "try it and see what happens".

 

[FROGO207]

I vote with trying first and get the collet crimp die if needed. With this die there will be no collapsed cases. Back when I got my 357 dies this die was not available and so far have managed to get along without it.

 

[LiveLife]

I'm trying to find published load data for a similar bullet using H110

https://reloadingdata.speer.com/downloads/speer/reloading-pdfs/handgun/357_Magnum_158_TMJ_FN.pdf

• 357 Mag 158 gr TMJ FN/JSP H110 OAL 1.570" Start 13.9 gr (1151 fps) - Max 15.5 gr (1217 fps)

 

[Waterboy3313]

https://reloadingdata.speer.com/downloads/speer/reloading-pdfs/handgun/357_Magnum_158_TMJ_FN.pdf

• 357 Mag 158 gr TMJ FN/JSP H110 OAL 1.570" Start 13.9 gr (1151 fps) - Max 15.5 gr (1217 fps)

I remembered I have that speer link saved to my phone last night. The speer data looks much more conservative than Hornady data. I also need to look but I think do have some xtps left over. I also think I have a bunch of 38 special loaded with 158gr XTPs. I decided a while back I wasn't going to load 38s anymore. Might see how many I have left and break them down.

 

[Waterboy3313]

I was doing some digging today after work. I think I have about 100 158 gr Hornady XTP bullets. That will probably be enough to get a decent work up done. I still want to use the RMR bullets because I have about 1200 of them.

I started reloading all of my pistol ammo with titegroup. More people than not are always weird about using titegroup because you can double or triple charge some cases and act like it's a scary powder. To be honest this H110 has me more concerned. As always pay attention to what you are doing and follow verified published load data. Still the H110 has me more on edge than the titegroup.

 

[joneb]

This will solve that issue,https://leeprecision.com/357-magnum-custom-collet-style-crimp-die.html
This is not a Lee FCD

Let me make a correction to this statement, this is a collet crimp die only and does not post size the finished cartridge.