CAUTION: The following post includes loading data beyond currently published maximums for this cartridge OR UNPUBLISHED. USE AT YOUR OWN RISK. Neither the writer, The High Road, nor the staff of THR assume any liability for any damage or injury resulting from use of this information.
I don't do 'sub-sonics'.
Being cheap, I did my testing with 147 grain GI pulls and some final testing with 150 grain 'Interbond'.
I found that seating depth has a greater degree in velocity (pressures) with the Blackout than other rounds that I load/have loaded. I also only use a LEE FACTORY CRIMP DIE.
Weapon tested is 16 inch DSA SS with Carb gas system.
All velocities at 10 feet.
With the above said...
H110/296 (I've tested both and get the same results - they are the same
) produces greater velocities at my acceptable pressure standards (primers flatting, expanding primer pockets, case head/web expanding - these are my arbitrary standards of acceptability) over Lt'Gun. However, Lt'Gun gives me some what better consistency and accuracy (marginal but enough to make me happy).
Using RP 300 Blackout brass with RP primers followed with CCI 400 primers and later with reformed Lake City GI brass and CCI 400 primers, all full length sized and trimmed before each loading.
H110/296:
Starting load 16.4g - 1928fps - 2.065in
Loads maxed at 17.5g - 1993fps - 2.065in (minor pressures)
Best load, 16.6g - 1945fps - 2.065in (very accurate)
Lt'Gun:
Stared at 14.5g, worked up to 15.4g - 2.160in.
Found 15.0g produced great results - 1870fps
5 shots, one hole at 100 yards as a norm. (these are GI pulls!)
Moving to 150 grain 'Interbond'.
H110/296 - 16.6g - 1908fps - 2.065in
Lt'Gun - 15.0g - 1791fps - 2.065in
The 'Interbond' premium bullets did better with the H110/296 loading but the GI pulls beat them out with the Lt'Gun.
My choice is Lt'Gun. H110/296 is also very good. For 110g V-Max, I like a loading of old Olin 630 best. As I don't shoot rapidly, I have not encountered excess heat from Lt'Gun.
Try both and see what your weapon likes best. This is the fun of loading for me.
Load safe.