Out of a 20" barrel 375 Ruger Guide Gun
1. WLRMP, 78.5grs. of RL17 powder and a Nosler 300gr. Accubond bullet seated 3.385" with a crimp with Lee factory crimp die. 1/2" 3-shot group at 100yds. Traveling 2590fps.

2. WLRMP, 73.0grs. of RL17 powder with a Woodleigh 350gr. PP bullet seated 3.385" with Lee factory crimp. Just under an 1" 3-shot group at 100yds. Traveling 2391fps.

72.5 gr of Reloader 15 and 250 grain Sierra gameking

Very accurate and easy to shoot as far as recoil

Hope it works for you as well

72 grains Re-15 with a 300 gr. Nosler Partition
will do anything that needs done.

700xcr

RL17 works great in .375 H&H for 300gr bullets, so it is not any surprise it works the same way in .375 Ruger. Works also perfect in 8x57 Mauser.

Thanks for posting,
Jiri

Jirl, R17 also works good in my 243win with Barnes 80gr. TTSX bullet.

I'm using 80 grains of IMR4350, a 270 grain hornady round nose bullet and a CCI mag primer. I'm getting a 3/4" group at 100 yards. I'm pretty sure this is what I'll be using for my grizzly hunt in Jun.

im getting 2700 with R 17 behind a 300 gn partition, and 3000 fps with R17 behind a 260 partition...both really great loads

I have a 24" Savage 116 375 Ruger and worked up several nice light and heavy loads using QL and checked them against several manuals and online data sources. I used RL-15, RL-17, WW760 and H414, basically the SAME powders I use for my 416 Taylor and 375 H&H, with Midways special offering of 270 gr RN's and Hornady 270 and 300 gr SP's and some Nosler 260 Parts tossed in.

My mag allows for the bullets to be seated out to slightly over 3.50" and the throat to slightly under 3.60"...one of the reasons I don't publish my actual COAL/COMPONENT data...I DON'T KNOW what your throat measures.


All the velos for the bullets ran ~2500 fs for the light loads and 2800-2875 fs for the heavy loads with a couple of the Nosler loads going over 2900 fs.


I had NO pressure signs, flat primers, hard extraction...QL's data showed all loads hovered around the 60-61 KPSI...for SPECIFIC COMPONENT parameters.


This is one specific example of what using data off the net can do to you...QL data 270 QL, RL-17, 20" Hawkeye, 2730 fs...24" Sav, 2850 fs...97% load/61.8 KPSI at 3.45" COAL...103% LOAD/71.3 KPSI AT 3.25" COAL from the Hornady 8th Ed, 2823 fs...notice I DIDN'T POST THE ACTUAL POWDER AMOUNT.

There is no easy street way to get reloading data other than reloading manuals then working up to find what best suits your rifle and game....measuring throat depth and being very careful...online data can be good or very ,very bad...the only way to know is to check against reloading manuals because they are conservative in the data they publish...going beyond that is on you.

Luck

QL doesn't work right for RL-17. I believe it is due to some surface coating or any other RL-17 special future which is not included in QL computations.

Jiri

I used RL-15 on some guns I built in that caliber, it got me the velocity I needed and was super accurate..

One thing Im pretty sure of is the 300 gr. bullet does its best work of killing big animals at 2500 FPS, not 2600 to 2700 that both the 375 H&H or the Ruger are capable of..