what reference has this burn rate type info ?

[kennisondan]

Hi : posed a question once on a forum about powder and load for a 45 colt.. the info that was provided was remarkable to me : the poster inidcated that a reference he had determined that there would be less unburmed powder and thus less recoil in a 4 3/4inch barrel using 300 grain cast and power pistol than the unique loads I was wondering about... gave me fps, pressure, and whether the efficiency (full burning of the powder ) was correct, and the recoil based on that, I think..
what I was most interested in was the unburned powder or complete burning of the powder and the effect of that factor on recoil ( and waste, flash, etc. ) but mostly speed and recoil affects...
the stuff I read about on programs and other references tend to talk about ballistics, but do not point out this interesting information as being available... I would also want to see approximate drop at different yardages with different sight in ranges..
the two manuals I purchased for reloading do not have that info in them..
please advise.
thanks
dk

[ihookem]

reloadbench.com/burnrate.html

[Luckyducker]

DK, I am not sure about any charting of powder characteristics such as this.  There are burn rate charts available as Ihookem stated at www.reloadbench.com and I believe at www.stevespages.com  I think for more complete propellent burn for a given cartridge while still in the chamber and bore a faster burn rate powder might be used.  For instance, my favorite 357Mag load for my 4" is 10 grains of Alliant's Bluedot behind 158 grain hardcast slugs.  This powder burns completely and is very accurate in my revolver but in my son's 2" Taurus it leaves unburned powder all over everything.  I don't load for his short barreled 357 but if I did I would probably try some W231 as the burn rate is faster and would probably burn more completely before exiting the short tube.  I am also of the mind that powder still burning as it leaves the barrel is what creates large muzzle flash, the key work here being "large", as there will always be some muzzle flash. 

I know there used to be some bullet trajectory data at the Remington web site, but please realize these are numbers created with their ammo that is shot in their guns and may or may not be similar to the performance of your loads and firearms.