This is a compressed load, increased the COL
to mitigate the powder compression, still
very good accuracy. This is a max working load
for this rifle, easy bolt lift and extraction,
adequate radius on the fired primers but getting close to the upper end.

2750 fps is great, from my limited testing RL 17
is a very good powder for the 375 Ruger.

I wonder how H335 would do?

Now, a blast from the past:



375/404 Saeed, 375 ruger

Seems to be some safety margin with your particular rifle for increased performance because Nosler lists 78.5 gr as the maximum load for their 300gr bullets in their test rifle (2672 fps, 26" barrel).

https://load-data.nosler.com/load-data/375-ruger/

back way off and use h335

I'm wondering if H335 is too fast for the 375 Ruger.

Anyone have any H335 load data, not a lot out there on the interwebs.

This is what the primers look like for the
above load:

Today's range results:

Same load as above, CEB 270gr TSG bullet

Mildly compressed

2875 2873 2819 2841 2828 2826 average 2843

3 shot group similar to the one above.

Easy bolt lift/ extraction, primers look the same as above.

The 84gr loads were more of an academic
exercise to test the upper load limits with these bullet/ powder combos. The 80gr loads produce velocities and accuracy that are more than adequate and will work just fine. Going from 80gr to 84gr is in the realm of diminishing marginal returns.

Point of reference, Federal factory ammo
fired brass I picked up at the range today


Notice the flattened primers

HT that is one heck of a load especially with a 300 gn TSX....My Satterlee Arms 375 Ruger hits 2710 with 79 gns of R17 behind a 300 nosler partition and thats with a 24 inch tube...i guess having the bullets molly coated accounts for a few extra grains of powder over my load


Daniel