Sub Sonic Load Data for a 20 inch 300 Whisper

silentbushmaster · Post by **silentbushmaster** » Wed Aug 02, 2006 9:29 pm

Any load data for a 20 inch 300 Whisper with H110 with 220 grain bullets?

memfuzz · Post by **memfuzz** » Thu Aug 03, 2006 3:20 pm

I'm using 8.9 grains, but haven't shot over a chrono yet. Hope to have that done in a few days.

silentbushmaster · Post by **silentbushmaster** » Thu Aug 03, 2006 9:53 pm

The data that I have shows that about 9.5 grains of H110 should be about 1030 fps. I will check speeds this weekend. Keep us posted on your data.

silentbushmaster · Post by **silentbushmaster** » Sat Aug 26, 2006 6:56 am

221 Fireball Case Reformed

220 gr RN Sierra Bullet

10.0 gr H110

CCI SR BR Primer

1040 FPS

This is for a Remington 700 action w/ a 16.25 length barrel.

Accuracy is sub MOA.

Garrett · Post by **Garrett** » Sun Oct 22, 2006 4:53 pm

I have 1189 fps from a 10" SSK Contender barrel.

10.5 gr. H110
Sierra 220 gr. RNSP
1.235 OAL

Might need to back that load off some.