RL17 is supposed to be a substitute for IMR4350.
Does anyone have any experience yet with calibers .35 and larger, especially 375 H&H and 416 Rigby??????

Thanks and Good Shooting

Tetonka
DRSS
Bolt Trash
Big Bore Lever Guy

check the big bore form, theres a thread running on RL17 in a 416 ruger, alot of other info in it as well,

quote:

check the big bore form, theres a thread running on RL17 in a 416 ruger, alot of other info in it as well,

Yep we had a lot of quessing and calculations. I believe Mighty Joe found that in a 20.5" 416 Ruger he was better off with RL15 than Rl17.

Thanks guys,
My concern has mostly with 375 H&H 24 inch bbl.
and
416 Rigby also 24 inch bbl.
Want to try this powder, need a starting point.
I've been shooting 95 gr. H 4350 in the .416
Rigby. From careful study of the Aliant book
looks like I need to start about 8 gr. less,
and run a couple over my Oehler 35P chrony.

Any other ideas send them on please. Will also check Big Bores but didn't want to post twice.
That's not nice.

Good Shooting

Tetonka

375 Ruger 24" Pac-Nor 3 groove in Winchester post-64 action

bullet/weight/powder/charge/OAL/velocity

TSX 270 RL17 74.0 3.285 2552
TSX 270 RL17 74.5 3.285 2564
TSX 270 RL17 75.0 3.285 2578
TSX 270 RL17 75.5 3.285 2564
TSX 270 RL17 76.0 3.285 2572
TSX 270 RL17 77.0 3.285 2573
TSX 270 RL17 78.0 3.285 2621
TSX 270 RL17 79.0 3.285 2643
AB 260 RL17 80.0 3.350 2760
AB 260 RL17 81.0 3.350 2798
AB 260 RL17 82.0 3.350 2849
TSX 270 RL17 80.0 3.285 2692
TSX 270 RL17 81.0 3.285 2714
TSX 270 RL17 82.0 3.285 2753
AB 260 RL17 82.5 3.350 2859
AB 260 RL17 83.0 3.350 2872
AB 260 RL17 83.5 3.350 2896
AB 260 RL17 84.0 3.350 2916
AB 260 RL17 84.5 3.350 2938
AB 260 RL17 85.0 3.350 2941
AB 260 RL17 85.5 3.350 2956
AB 260 RL17 86.0 3.350 2978
AB 260 RL17 86.5 3.350 2996
TSX 270 RL17 82.5 3.285 2772
TSX 270 RL17 83.0 3.285 2766
TSX 270 RL17 83.5 3.285 2830
TSX 270 RL17 84.0 3.285 2941

It shot many good groups but this is the load I settled on



No pressure signs

You have a little less powder capacity in the H&H but it should be close

Start on the low end of course, my Pac-Nor 3 groove may not develop as much pressure as a typical barrel

Thanks Woods,

I'll be shooting 350 grain North Fork bullets in the 375 H&H and I see you are mostly using
270 grainers in the Ruger version. Probably a
little too much difference to interpolate. (Note the big word, Will might be impressed)
Looking for 2350 fps. for the 350 gr cup nose solids. Serious buffalo medicine. The Alliant guide only takes the powder up thru 338 Win. Mag. Have been unable to find out if RL17 is also not Temperature sensitive like RL15. Anybody know about this?????

Tetonka