Magpro in a RUM?

[FEENIX]

I was going to get some as my LGS had lots of it in stock but after looking over charts with burn rates and temperature stability rates, I found magpro was not very good with temperature stability actually one of the worst so I scrapped that idea quick

That's what I was told too, but I have very good experience with it and loaded up at $28 a pound. Now Scheels cannot keep them on their shelves at $48.

 

[Jim’s Hunt]

Mag Pro for WSM and Retumbo for RUM

 

[Orange Dust]

It maybe so, but it is clearly being used effectively on non-short mag cartridges.

View attachment 523184

I forgot, I also use it on my .257 WBY and 145 Black Hole bullets.

You bet. All three .257, .270, and 7MM very similar in case capacity to the WSM's. You can add rem 7 and win 264 o the list too. Magpro also is a good powder for the old .270win with 140's. Very useful powder IMO.

 

[Leaf Litter]

Runs great in my 6.8 Western with various bullet weights. No issues with abnormal pressure behavior.

 

[Jim’s Hunt]

Runs great in my 6.8 Western with various bullet weights. No issues with abnormal pressure behavior.

What bullet you using

 

[Toyotaon40s]

You guys have me nervous now, I worked up at 45*. I do all my hunting in fall/winter so I'll likely be okay but I think I better check during summer just in case. I found a chart showing 1.1fps/degree, which is lower than RL25. A ton of dudes run RL25 in magnums and don't sweat the temp sensitivity. I'll probably be alright

 

[Jim’s Hunt]

You guys have me nervous now, I worked up at 45*. I do all my hunting in fall/winter so I'll likely be okay but I think I better check during summer just in case. I found a chart showing 1.1fps/degree, which is lower than RL25. A ton of dudes run RL25 in magnums and don't sweat the temp sensitivity. I'll probably be alright

The load I'm using bin my 270 WSM with 175gr Sierra TGK hasn't show bad red flag pressure signs from 90° to 20° with Magpro

 

[Toyotaon40s]

The load I'm using bin my 270 WSM with 175gr Sierra TGK hasn't show bad red flag pressure signs from 90° to 20° with Magpro

Are you loaded near max? I'm right at Bergers max, but a grain below nosler max. I never found real pressure other than really minor primer flattening and am running about .5 grain below the hottest load I tested.

 

[Lefty7mmstw]

What issues did you have, and what cartridge?

hangfires... mostly in wsm's but I tried the stuff in at least 1 belted before tossing it...

 

[Toyotaon40s]

hangfires... mostly in wsm's but I tried the stuff in at least 1 belted before tossing it...

Did you try different primers at all? I've always been told if experiencing hang fires or large amounts of unburnt powder to try a hotter primer, magnum or military

 

[Lefty7mmstw]

Did you try different primers at all? I've always been told if experiencing hang fires or large amounts of unburnt powder to try a hotter primer, magnum or military

mostly 215's irrc... it's been a LONG while... rl powder was plenty available, so we didn't worry...

 

[Toyotaon40s]

mostly 215's irrc... it's been a LONG while... rl powder was plenty available, so we didn't worry...

just curious, with RL and VV powders being soo scarce I'm tempted to commit to magpro. Cheap and always available.

 

[hemiford]

Curious if folks have tried StaBall HD as well in the RUMS.

 

[338 dude]

Thanks.

I was liking the spherical aspect but not if it has pressure issues.

Anyone else?

I don't know what you would call issues it's just going up my ladder. Everything was going fine then with just another small step I got heavy bolt lift, and flattened primers. also, this was during the warmer months, not during hunting season.