357 carbine

[iblong]

My local GS is getting in my new R92 lever action Monday and I was looking at load data in a few of my manuals.
I have a load I really like in my 586 its a max load of 2400 under a 158 Hornady xtp according to most of my books this is over max for a carbine by almost a full grain.does the longer barrel create so much more pressure that it has to be down loaded.I was really hoping to use the same loads in pistol and rifle and not have to down load my revolver.

 

[Walkalong]

If it is safe in a revolver, it is safe in a carbine. All data from trusted sources is safe in both. You never see "revolver only" .357 factory loads.

 

[iblong]

Thank's that's a good point,just thought it odd that the 357 rifle data was less than revolver data in the manuals.

 

[Walkalong]

Hopefully your load will shoot great in both. Worst case is you have to tweak it.

 

[CoalTrain49]

Speer 14 says the load data is the same for both rifle and pistol. The only difference is the the MV which is about 400 fps faster from a carbine.

 

[iblong]

yep that is the only manual I have that said that the rest show it as over max.

 

[Steve C]

according to most of my books this is over max for a carbine by almost a full grain

While load manuals provide a max charge that should not exceed maximum allowable chamber pressure their data isn't usually a load to that pressure but a point where one obtains optimal accuracy within the load range. The lighter loads for rifles is probably due to optimizing the velocity of the particular bullet for accuracy and not a pressure issue.

 

[joneb]

Hornady's 8th edition has data for the Rossi M92 357 magnum w/a 16" barrel
158gr jacketed with WSPM start charge is 9.3gr of 2400 and max is 13.8gr of 2400.

 

[BCRider]

I've noticed that as we look at different loading data sources that information seems to be about 5'ish% different from one source to the next for the pressure from a given amount of powder. So when you say that one source lists a load for 2400 that is different than data from another source by one grain this is well within a 5% tolerance. With all the various factors that can change during such actual physical testing it's a wonder that the results are only over a roughly 5% variation from one source to the next.

There is also another good reason not to dwell too much on such small variations in load data. The simple fact that everyone agrees that we should start a little down and work up watching for over pressure signs.

So if your present loads are not overly distorting the primers so they flow totally out to fully fill the primer pockets and if you're getting a reasonable life from your brass then I'd say your loads are good to go for any gun.

Accuracy is another issue. But from what I've seen in my own Rossi the rifle is capable of more accuracy than my 60 year old eyes and nerves can provide even over a wide range of loadings from cowboy action .38spl like loads up to full power 2400 Magnums. Overall though the rifle makes shooting even smaller and tighter stuff a pleasure. But I admit that I'm talking things like 18 inch gongs at 200 or 4 inch bonus targets at around 30 yards. I've never tried to see what it would do rested on bags at 100 for example.

 

[PJSprog]

We'll be expecting a full range report, iblong.
... and perhaps even some photos.
Enjoy!