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175 smk and RL15

From my experience in a Savage F/TR 41.3 was in the 2650 neighborhood. 43.1 grains RL15(rumored M118LR equivallent) was too hot. Components were 175 SMK, LC93Match brass, Fed LR Match primers, RL15.

I know, big jump in powder weight. I was starting to work up a load and trying some of the "go to" loads. In a friends newer F/TR 43.5 RL15 is a good load. My point is work up a load for your rifle. Sierra lists 35.8 to 41.3 as min and max. For temperature swings I'm reworking with Varget (36.3 - 41.7)instead of RL15.
 
Just get some 2000MR and load up 47grs or so with a WLR primer and youll enjoy more power & speed than with RE15. Im getting 2723 in a 24" tube with 47.3grs. under the 178HPBT Hornady. You'd be lucky to get 2500 with a max load of RE15.
 
Using RL15, the Sierra Load Map shows 41.3 as a max charge. In my Sav m10 FCPK I worked up to 42.4 gr of RL15 before I found pressure signs on the fired brass (light primer crater and a shiny mark on the case head but bolt lift was normal). My accuracy node looked like 41.6 which I confirmed with loads at 41.5, 41.6 & 41.7 gr.
RL15 + 175 SMK + Wnchester Primer + SWA Brass (instead of Winchester Brass)
 
There is a ton of information out there. Best advice is to do your research, obtain a reloading guide, figure out which brass and primers you'll use since they affect performance. And always start low and work your way up to the slightest signs of pressure. Accuracy trump's velocity.

Here is some interesting reading on the development of the 7.62 NATO Long Range Match Cartridge > The Rifleman's Journal: Cartridges: 7.62 NATO Long Range Match Cartridges - Part 2
 
You should have at least 2 manuals that give such info. Dont just ask on the net?

Agreed. I have 4 manuals and I cross reference each before starting a new load. Also, check each major manufacturer's website. A lot of them, especially the powder companies (Hodgdon & Alliant come to mind) have reloading info on their websites. Shooting 175 SMKs? Get Sierra's manual!

Also, keep a log of what you reload. Take notes on your results, what works, and what doesn't. This past winter I pulled out my log and used 10 year old notes to develop a new load for my Highpower, cross-the-course rifle. Fired one match for practice, then won my second match. Having the good load data helped me get good dope very quickly.

Beware the "magic" load someone gives you on the internet. Don't take any forum advice as gospel, unless you are comfortable with your rifle blowing up in your face. Always follow safe reloading practices.