What's your favorite powder for 155's

hubcap500 · 03-19-2011, 12:29

Just got some Hornady 155XTP's to work up a self defense load since I can't find 135's anywhere. I'm using a Glock 20SF and want the highest velocity with acceptable pressure/brass life/reliability. Accuracy can take a back seat on this load for up close and personal ranges.

robert91922 · 03-20-2011, 15:31

Vihtavuori 3N38.
With this powder you can safely reach 1500fps IF you have a good after market barrel with FULL supported chamber.
I have G20 w. IGB barrel, standard length. Use standard primers, avoid magnum. With such barrel start at 12.4gr and rise in 0.2 steps.
With stock barrel start at 11.4gr and look for smileys, then stop and go down 0.2gr.
COAL 1.262 - 1.266.
With stock barrell you CAN NOT reach 1500fps safely.
All stated valid for winter temperatures. In summer go down 10% with powder, don't push your luck.
P.S.: for SD use only new brass.

**texas 48** · 03-23-2011, 13:34

Got to the range today and ran these loads over my Chrony. Used 4.6 inch LWD barrel In my 20sf and KKM 4.6 inch barrel in my G29. New Starline Brass, CCI 350 LPM. Temp 75 degrees F. COAL 1.255 for PP and 1.260 for 155XTP. 12.0grains LS some residue in the cases appears did not burn all the powder It appears that Longshot @ 11.5 grains is the sweet spot for my 4.6inch barrels and Power Pistol is the powder of choice for my 165gr Golden Sabers. No pressure signs , no bulge in cases normal some flattening of primers but not completely flattened, no cratering. Longshot surprised me with the 155XTP maybe some room in the 165GS but when I am Getting almost 1400FPS with 10.0 grains PP don't think I will gain anything

155XTP
Grains-------Powder------Average-----STD DEV------Energy Ft/lb------
11.0 --------LngShot-----1417.33-----12.34---------691--------------
11.5 -------LngShot-----1477.33------9.44--------751--------------
12.0 --------LngShot-----1430.00-----15.49---------703--------------
12.0 --------LngShot-----1435.00-----10.34---------708--------------
10.2---------Power Pistol-1388.00-----18.19---------662--------------

11.5 gr Longshot is the sweet spot for my 10mms
1477 ft/sec 9.44 SD Dev 751ft/lbs energy and one accurate bullet from a 4.60 barrel. With a 6inch barrel could get 1550 ft/sec.836ft/lbs energy. pretty amazing.