So I am working with this powder and it shows promise.

Rock Island Ultra 5" model

190 grain WFN plain base Hi-Tek coated
sized to .4015
IMR Blue Powder

9.5 grains - avg. velocity 1135 fps - 30 fps S.D.
10.4 grains - avg. velocity 1165 fps - 26 fps S.D.
11.0 grains - avg. velocity 1,196 fps - 7 fps S.D.


I think I'm about there.  Going to try another few tenths to see what comes of it.  I figure if I'm at 1225 fps to 1250 fps that would be good.  I will note that recoil is milder than Longshot and also not as loud.  I need to shoot at night to see what flash is like with this powder vs Longshot.

Regards to Longshot with 8.2 grains, the same 190 WFN and at 1250 fps the brass looks fine having no signs of pressure with a max or near max load.  I do have a bit of leading with the Longshot load and hoping that IMR Blue will remedy this issue.

Robs, Thanks for your report...Based on what I saw from others to include 12ga shotshells it has been very close to the Blue Dot by actually weight not density.  (correct me if I wrong with this statement) 

I would say that is a pretty accurate statement.  I actually think that IMR Blue is a tad slower........at least in 10mm.  I want to see if the IMR version has less flash or not just need to go out early morning or in the evening.

Quote from: The_Shadow on July 19 2017 09:34:02 PM MDT
Robs, Thanks for your report...Based on what I saw from others to include 12ga shotshells it has been very close to the Blue Dot by actually weight not density.  (correct me if I wrong with this statement) 

IMR states the following on their web site about Blue vs the competitor, presumably Blue Dot.

"For pistol usage, pistol data is materially different from competitor data with lower charge weights and higher velocities at maximum pressures."
http://www.imrpowder.com/shotpist.html

So, it appears Blue will produce higher velocity with a lower charge weight than Blue Dot. It remains to be seen if it will be any more consistent than Blue Dot at various temperatures as the latest MSDS dated June 2017 states Blue is a double based powder. It will be interesting to see if it will shoot more accurately than Blue Dot?   

Quote from: sep on July 20 2017 08:33:19 AM MDT
IMR states the following on their web site about Blue vs the competitor, presumably Blue Dot.

"For pistol usage, pistol data is materially different from competitor data with lower charge weights and higher velocities at maximum pressures."
http://www.imrpowder.com/shotpist.html

So, it appears Blue will produce higher velocity with a lower charge weight than Blue Dot. It remains to be seen if it will be any more consistent than Blue Dot at various temperatures as the latest MSDS dated June 2017 states Blue is a double based powder. It will be interesting to see if it will shoot more accurately than Blue Dot?

This is what IMR (Hodgdon) is stating for the entire line of new powders - IMR Target, IMR Red, IMR Green, IMR Unequal, IMR Blue and it is a general statement for each powder.  Through comparison between Alliant Blue Dot and IMR Blue, my chronograph results of 10mm testing indicates that IMR Blue produces less velocity (pressure) vs Alliant Blue Dot when all other variables as such - powder charge, bullet, COAL, reloading techniques etc. are the same.

Went out yesterday and with 11.5 grains of IMR Blue sitting behind 190 grain WFN style Hi-Tek coated wheel weight (12-13 BHN) bullet I worked up some nice results. Pushed out of the 5" RIA 1911 barrel, I was seeing 1,235 to 1,246 fps across the chrono and accuracy was good as I picked off 12 gauge shells at 15 yards off the bench. 

RobS, Sounds like some great results, how did the cases and primers look as tested?

Cases and primers were good, no different than other loads at similar velocities i.e. Longshot, PowerPistol.  There was virtually no leading if any, only the light antimony wash associated with WW alloy.  The Longshot and PP loads showed some leading near the muzzle at similar 1,230-1,250 fps area which tells me that there could be less pressure or at least less pressure during the first part of the barrel.