what's critical to you speed or accuarcy

[gbk]

[QUOTE=overtheir;1220320]ok ..... I tested fired differnt recommend grains of the powder on hand ,settled on the best group and know I wanted to know the speed , chronograph found my average . Looking at the a manufacture web site of the same bullet and caliber they state 2800fps at muzzle mine came in at 2550 average chrono was 5 feet in front of muzzle. . I realize these are hunting guns and not target guns...

Just on the note of Mfg. speed vs YOUR speed.

You should not beat yourself up on that topic.
Like in many advertisements -manufacturers use the BEST parameters for their products.In this case -that being barrel length.
Great chances the test barrel was 24".

Your barrel in most likely NOT 24".
Few inches shorter barrel makes up for the missed speed.

Other then that-many good advices above. I second the notion of accurate shooting capability is more important then few FPS more.
You just need to know your limits.