I figured that most reload data was copies of copies of other companies data ...of web sites ...yada yada.
so in my ignorance i relied mostly on the LEE 2nd. edition to come up with loads on my springfield 9mm
R.O. 1911 auto.
without looking up a load ...i'll give you example of my problem..........
lets say.......minimum charge = 5.6 of powder and maximum is 6.6 ............so!...........
i figure i'm safe enough loading 6.1 grains ............wrong!.......6.1 will NOT cycle the action!
neither will 6.6 grains ...so i'm going WTH!....???? why?
so i get a few more manuals .....and here's where it gets odd.
5.6 to 6.6 in the Lee manual doesn't even come up to what Lyman 49th. says or speer or hornady
they start at min. 6.8 to a max. of 7.9......this on a 9mm!
has the lawyers gotten to the load data people and told them to water down the loads "so in case someone gets hurt".... they can't sue them for having hot loads?
so ...these past 10 days i've been compiling data from 9 different sources using all the same components,
with regard to bullet weights and styles.
and i've done this for these calibers...
30 carbine
.380 acp
9mm
.38 special
.357 mag
40 s&w
10mm
44 rem mag
45 colt
45 acp
50 S&W
and in every caliber i found that the speer website has consistently has Higher start loads and higher Max loads than most other websites or books.
there are cases where there are huge spreads of number variances in most calibers of ammunition....across the data board!
yes i know i should have made only a few ...and fire tested them ....my range is 40 miles away.
and i figured that 80 to 90% of max was safe ...wrong! ....they would fire alright...then jam because
the empty didn't clear....and i could nearly outrun the bullet!
so now i must break down a bunch of 9mm as they are too weak to cycle.
yeah... i'm hard headed ....must test more before green lighting the mass of 9mm to be made.
what i've learned .... don't rely on ANY data....use it as a starting point and work up to what the gun likes.