270 WSM - Berger 170 EOL or 165 Matrix Loads using RL33

[Floundertrap]

Hello All,

I've read everything I can on load data for a heavy .270 WSM, including a lot of good data in this post: https://www.longrangehunting.com/threads/270-wsm-170-gr-eol-berger-load-development.187171/ . BUT I can't get my hands on Retumbo at the moment and I was able to find some RL33 that looks promising in the table below. I can't see where anyone has used RL 33. If anyone has, would you share your data? I built 270 WSM on a Browning ABII (Long Action Magnum) with a 28" Brux 1:8 twist. Any help is appreciated.

TK

.270 Winchester Short Magnum
170 Grain, PN: 27575 Bullet, 2.944" COAL, 24" Barrel. 2/4/2016 RB
Bullet	Powder	Start Load In Grains	Approx. Start Velocity	Max. Load In Grains	Approx. Max. Velocity	Approx. Fill Ratio
170 Grain	Accurate Magpro	62.0	2749	65.2	2895	94%
170 Grain	Alliant RE-19	56.5	2707	59.4	2831	91%
170 Grain	Alliant RE-22	59.0	2744	61.9	2871	94%
170 Grain	Alliant RE-23	58.0	2695	61.1	2817	96%
170 Grain	Alliant RE-25	61.0	2750	64.3	2886	100%
170 Grain	Alliant RE-26	60.5	2767	63.6	2899	91%
170 Grain	Alliant RE-33	70.0	2769	73.9	2959	103%
170 Grain	Hodgdon H4831SC	58.0	2684	61.0	2817	93%
170 Grain	Hodgdon H1000	63.0	2730	66.3	2881	103%
170 Grain	Hodgdon Retumbo	66.0	2780	69.5	2932	106%
170 Grain	IMR 4831	54.0	2668	56.6	2772	91%
170 Grain	IMR 7828 SSC	59.0	2749	62.0	2887	93%
170 Grain	Norma MRP	59.5	2760	62.5	2891	92%
170 Grain	Ramshot Magnum	63.5	2708	66.8	2854	94%
170 Grain	VihtaVuori N160	57.5	2657	60.4	2779	97%
170 Grain	VihtaVuori N560	59.5	2767	62.4	2899	94%
170 Grain	VihtaVuori N165	59.0	2655	62.1	2783	97%
170 Grain	VihtaVuori N170	64.5	2655	68.1	2817	106%
170 Grain	VihtaVuori N570	67.0	2796	70.5	2967	103%

 

[sedancowboy]

I suspect that you can't get that much RL-33 in the case? I run RL-26 in my 270 WSM with a 170 Berger EOL at 3050fps in a 26" barrel.

 

[bigngreen]

I know R33 has been used under the 170 just can remember who ran it, I remember it was good, is it throated for the 170 or is it a SAMMI throat? The 66gr of Retumbo is my go to load usually and it's showing a higher load density than the R33 so it may fit but I personally keep a pile of Retumbo the the 270 WSM's.

 

[Floundertrap]

I know R33 has been used under the 170 just can remember who ran it, I remember it was good, is it throated for the 170 or is it a SAMMI throat? The 66gr of Retumbo is my go to load usually and it's showing a higher load density than the R33 so it may fit but I personally keep a pile of Retumbo the the 270 WSM's.

It is throated for an oal of 3.130 and .015 or so of jump. I built it on a 7mm mag action to have plenty of mag length, didn't consider the case diameter would limit the mag capacity to only 2 rds. But when I saw the RL33 max load was 103% of case capacity, I figured if the retumbo worked at 106%, surely the RL33 would work?

 

[Floundertrap]

I suspect that you can't get that much RL-33 in the case? I run RL-26 in my 270 WSM with a 170 Berger EOL at 3050fps in a 26" barrel.

Thanks sedan, I was torn between the two and I can still get 26 and 33, so if 33 doesn't shoot and I still can't find Retumbo, I should be able to try 26. Right now I'm just trying to find someone who has a good 33 load.

 

[sedancowboy]

Bigngreen knows more about the 270 WSM than all of us put together. He taught me what I know. He is the guru of all things 270. RL-26 has been very good in all 270s that I have tried it in from 145 ELD-Xs to 170 EOLs. H-1000 has also been good in the heavies.

 

[eshorebwhntr]

I can't give you any direct advice on the WSM but I've been a 6.5 SAUM shooter for quite some time. I've used H1000 in that cartridge for a long time with good success. I bought some N570 recently and decided to give it a try just out of curiosity. I have been very impressed thus far. If you can find some to try I would give it a shot. I think you'll be happy.

 

[Floundertrap]

I can't give you any direct advice on the WSM but I've been a 6.5 SAUM shooter for quite some time. I've used H1000 in that cartridge for a long time with good success. I bought some N570 recently and decided to give it a try just out of curiosity. I have been very impressed thus far. If you can find some to try I would give it a shot. I think you'll be happy.

Yeah, sadly I can't find any H1000, N170 or N570, or Retumbo because we have an election in a week. Not sure where the heck all the powder is going but it's not Eastern NC.

TK