How close are RL17 and H4350?

[Weaver93]

What's it say for 250 grainers?

Here you go!

 

[memtb]

I'm currently doing some looking into the best powders for the 338 RCM, and I am seeing a good bit about RL17. Problem is I can't find any right now. Last week I picked up some H4350 just because I know it is pretty versatile, and I see now that it is right next to RL17 on IMR's burn rate chart with H4350 being #124 and RL17 being #125. I'm curious to know if these two powders behave similarly in cartridges like the 338 RCM and if I could work up with H4350 from a start load of RL17. Thanks!

Also I'm all ears for powder suggestions for the 338 RCM. I have H4831SC, Varget, IMR3031, TAC, and the aforementioned H4350 that might make good candidates.

When searching for a potential load for my 375 AI, I decided to try RL 17 as it had very similar burn rate to H 4350 used in 375 Weatherby load data. It worked outstanding for me! YMMV memtb

 

[RockyMtnMT]

Under a hundred bucks? I hope it was at least half a hundred bucks!

 

[Carlos88]

Here is some loaddata.com info:

 

[atl5029]

Here you go!

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Thank you

Here is some loaddata.com info:

and thank you too

 

[Weaver93]

Thank you

and thank you too

De nada

 

[atl5029]

Here is some loaddata.com info:

What is this from?

 

[Carlos88]

Loaddata.com

You have to sign up. It's basically from Peterson's Hunting, Handloader & Rifle magazines and reloading manuals.

It's a good resource but a little slow on the uptake with powders such as (Enduron) IMR4166, IMR4451, etc.

 

[skipglo]

You can never go wrong with H4350

HEEEEEE'S BAAAACK! Wherever have you been Brother! All good?

 

[ButterBean]

HEEEEEE'S BAAAACK! Wherever have you been Brother! All good?

All is well brother, I quit my job and started a new business so I've been off the grid for a bit, on top on top of that there were a handful of folks that said I was ruining this forum so I wanted to make sure that I wasn't

 

[muzzletalk]

RL 17 is a double base powder whereas H4350 is a single base. As such, you'll see higher velocities and generally lower pressures in the RL17. However, it is more susceptible to humidity and it's not part of the temp stable family. RL 17 shines in the short action magnums where many powders pressure out before achieving a good velocity. As others have mentioned, H4350 is a very universal powder. If you can get it to achieve the velocity you want without overpressure then that's your ticket. I find it to be very accurate and less finicky with temps and humidity.

 

[Veteran]

I'm currently doing some looking into the best powders for the 338 RCM, and I am seeing a good bit about RL17. Problem is I can't find any right now. Last week I picked up some H4350 just because I know it is pretty versatile, and I see now that it is right next to RL17 on IMR's burn rate chart with H4350 being #124 and RL17 being #125. I'm curious to know if these two powders behave similarly in cartridges like the 338 RCM and if I could work up with H4350 from a start load of RL17. Thanks!

Also I'm all ears for powder suggestions for the 338 RCM. I have H4831SC, Varget, IMR3031, TAC, and the aforementioned H4350 that might make good candidates.

Here's a burn rate ranking from QuickLoad. It looks like RL-16 may be closer than all of the others to H4350 in burn rate starting point Ba.

You might weigh the temp. stability of RL 15 and RL-16 vs. each other and vs. H4350. Recently, H-4350 has been very available.
I have seen it for sale just about every day the last 2 weeks. However, I have seen almost no Alliant powders at all--think I saw some RL 15.5 a few days ago.

This chart below ranks each powder by Burn Rate numerically, from slowest to fastest.

H4831 SC	0.4301​
RL17	0.47​
RL16	0.4955​
H4350	0.513​
RL15	0.52​
Ramshot TAC	0.57​
IMR 3031	0.5772​
Varget	0.615​

 

[DHBWA]

I've tried RL17 in several different calibers and it usually got better velo than H4350 but temp stability and group consistency results always went in favor of H4350.

This…..

 

[vedauvoo]

I have a related question. On the burn rate charge I have, RL-16 is 123, H4350 is 124, and RL-17 is 125. I understand that RL-16 is very temp stable.

I have 8 lbs of RL-16 and no H4350. How do these 2 compare?