RL-33 Load Data

[AZShooter]

I see you are in the same fix I was with my various chamberings when I got my hands on some of the first RL-33 in the country.

I used it in:

6mm-284 with the 105 berger match hybrid target
300 RUM with 230 gr Berger match hybrid target
7mm-375 Ruger with 180 gr Berger match hybrid target
257 Weatherby with 110 accubonds


I believe a good place to start is to begin load development with a near max charge of Retumbo, suggested my Hodgdon, for each of your cartridges.

I just looked up the 338 RUM with a 250 gr bullet on Hodgdon's site. Min is 97 and max is 101 gr, a compressed load. You could start at 98 or 99 and work up. I have a feeling that it might be too slow for that combination and you will run out of room before you equal Retumbo. It depends on your OAL. It usually works best for the heaviest for caliber bullets.

Kirby did some testing with RL-33 and says seating the bullet into the rifling it helps to lower ES.

 

[Idaho Trecker]

Thanks for the input it gives me somewhere to start. My problem is that most of my rifles are factory that have been rechambered since I'm still working on college and are shorter barrels with standard twists. From what you suggest it sounds like the only chambering I have that might work for this powder is my Dakota with the 208's I have. Most my other rifles wont stabilize the heaviest bullets for the caliber. Sure hope it works for something I have at the moment since I just bought 3 pounds.

 

[bassin93]

62 grns RL33 in my 284 Rank, 180 hybird, 2840 fps with 4fps spread in 5 shots
28" Krieger

103 grns RL33 in 338 edge, 300SMK 2990 fps with 7fps spread in 5
30" Lilja

 

[Elkhunter1983]

284 Rank?

 

[bassin93]

Its an improved 284 my buddy had a reamer made up for. the 284 shehane has 15thou taper and a 35 degree neck. This has a 10 thou taper and a 40 degree neck. It holds 5 more grains of 4831sc then the factory 284 which has a 25 thou taper and a 35 degree neck

 

[AZShooter]

Idaho tracker,

I think you can use RL-33 with your 240 Weatherby and the 6mmAI and the 105s. I didn't say the heaviest bullet was an absolute. My 257 Weatherby and 6mm-284 are not using the heaviest but close.

I just found a RL-33 load for the 338 RUM and a 250 gr bullet on Alliant's website.
Max load of 106 gr for velocity of 2,988 from a 24" barrel.

So I guess you can give RL-33 a try in every rifle you mentioned!

 

[Fotis]

[email protected]

thanks

 

[Doublezranch]

I'll take it too if you don't mind!!

[email protected]

Jayson

 

[barnesuser28]

I posted it on page 15

 

[Doublezranch]

Thank you Riley

 

[MontanaRifleman]

Keep us posted, I would like to see how RL-33 stacks up against my 28" 6-284 pushing 107's with Ramshot Magnum.


t

Velocity wise correct? If I recall correctly (SWAGing this one) The velocity I use in Ballistic FTE is 3425fps. validated to 1060yds....

I think!


t

After round 1 of load development yesterday, I got 3472 with the 105 hybrids and 64 gr of RL33 out of the 26" nitrided tube - no pressure signs yet, 64 gr was all I could fit in the case. Temp was 23.