Powder for 6.5RPM?

Husky user

Active Member
Joined
Nov 24, 2020
Messages
29
Location
Seeley Lake
I am just starting to reload for 6.5 RPM(using Accubonds LR 142)
Everything I see says RL25 is best,don't have any,all I have is RL26 & 4350.
Have located 2lbs of 25,if I get there in time.
Anybody else had an luck with anything else.
 

Wachsmann

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Feb 1, 2008
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911
Location
Idaho
This could be interesting. I wonder how it compares to the 264win mag. What's the twist rate on that gun?
 

Wachsmann

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Feb 1, 2008
Messages
911
Location
Idaho
I think on the 264 win mag its a 1/10 but i'm not 100% sure. I'll try some 140 in it once I get a scope for it.
 

Andrew Massi

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Jun 4, 2018
Messages
497
Location
Lincoln Ca
I am just starting to reload for 6.5 RPM(using Accubonds LR 142)
Everything I see says RL25 is best,don't have any,all I have is RL26 & 4350.
Have located 2lbs of 25,if I get there in time.
Anybody else had an luck with anything else.
Theres data on the hodgdon site.
I'm going to focus on retumbo/h1k for the 140s
And Rl26 with 120-127.
Have also seen impressive velocities with vv n560
 

Wachsmann

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Feb 1, 2008
Messages
911
Location
Idaho
Well I was able to get a load working in the 142 ABLR. It was 30 thousands off the lands with 40 grains of hybrid 100V. Now I will start working on upping the charge weight. I may have to go back and vary the length a little but if I can keep it in that .5 inch group I'll be a happy man and the deer better watch out when I get a tag.
 

Husky user

Active Member
Joined
Nov 24, 2020
Messages
29
Location
Seeley Lake
Comparing max loads for RL25 &26 in my 7mm Mag
I should just drop 4 grains(70 -66) so I could start at 58 ,60 62 max
Any ideas on that?
 

highdrum

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Joined
Nov 30, 2008
Messages
2,553
Location
Montana
Comparing max loads for RL25 &26 in my 7mm Mag
I should just drop 4 grains(70 -66) so I could start at 58 ,60 62 max
Any ideas on that?
Here's some load data for a 140 partition, should be close to a 142 ABLR. They started at 62gr w/ RL25.
Screenshot_20201206-204945.jpg
 

Husky user

Active Member
Joined
Nov 24, 2020
Messages
29
Location
Seeley Lake
Thanks ,I have seen this ,just trying to compare RL 26 which I have to RL 25 which I don't.
One other question, they sat RL 26 is more temperature stable than RL 25.
What temperatures are they talking about?
 

BEEMAN

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Joined
Oct 20, 2011
Messages
1,682
I’m not familiar with the 6.5 RPM. Max loads look close to a 6.5 Sherman. If they are similar, give N570 a try with 140’s. I get 3339 FPS with my Sherman and a 28” barrel. As far as R26 goes I believe it’s quite stable until you get above 75-80 degrees. But don’t quote me on that.
 

highdrum

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Joined
Nov 30, 2008
Messages
2,553
Location
Montana
Thanks ,I have seen this ,just trying to compare RL 26 which I have to RL 25 which I don't.
One other question, they sat RL 26 is more temperature stable than RL 25.
What temperatures are they talking about?
Temp stability: the rate at which velocity changed with ambient powder temp. If you're using a very temp stable powder like H1000 , you may have a 20fps spread from 20° to 90° faster fps as temp increases. If using a known temp sensitive powder like RL33 you may see 75 fps spread across that same temp swing. All cartridges will be a little different. But start with a known stable powder, and do velocity testing at the coldest and warmest scenarios you'll be shooting in to know where your load stands.
 

Husky user

Active Member
Joined
Nov 24, 2020
Messages
29
Location
Seeley Lake
I am just starting to reload for 6.5 RPM(using Accubonds LR 142)
Everything I see says RL25 is best,don't have any,all I have is RL26 & 4350.
Have located 2lbs of 25,if I get there in time.
Anybody else had an luck with anything else.
Had a friend give me 2 lbs of 7828,1 of regular 1 ssc.Started using the reg.with 264Win Mag data.I am up to 61 gr ,no sign of pressure,wondering though if I should start using mag.primers since I am over 60 gr.?Any thoughts.
 

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