Finally got some powder for my .308 and am setting about working up some loads in a range of bullet weights and shapes to see what it likes and give me some options
Powder of choice is N140
PPU 150gr FMJ,
168gr SMK, 175gr SMK, 190gr SMK and
often with load data the exact bullet is not listed and you need to look at the general weights and apply common sense to work up a range. but this just goes to show that the data is a best guess that you MUST work up to in your rifle
VV data is as follows:
150gr - 36gr to 45gr/47/48.4gr depending on bullet make
168gr - 36 to 42gr
175gr - 35 to 42gr
190gr - 37 to 42gr
200gr - 34 to 42gr (NB, no 208 listed)
now call me cynical but that data isn't worth the paper it is written on
50gr or 33.3% weight variation in projectile and the starting loads are within 3gr of each other!
With the exception of one set of data all the max loads are the same!!
comes with the caveat:
"LIGHT GREY TEXT BOX INDICATES MAXIMUM LOAD - USE WITH CAUTION!
LOADS LESS THAN MINIMUM CHARGES SHOWN ARE NOT RECOMMENDED"
Factor in changes in barrel length, leade profile, groove and bore diameter, primer burn rate, seating depth, crimping, chamber dimension, brass thickness and case volume and the variables in pressure could be considerable.
just further proves to me the need to work a range for your rifle based loosely on the manufacturers data.
Start low work up to your rifle's pressure capabilities