[300whisper_newbie]

KLRIDER Wrote :

I did go look at the H&R SB2 Ultra Rifle in .26-06 and bought that puppy. A good looking gun, decent sharp checkering, crowned muzzle, 4 and 3/4 lb trigger, reasonably smooth, nice recoil pad. Put on a Burris 4.5x14 scope and sling and it tips the scale at 8 pounds, not too heavy to carry easily, heavy enough to absorb some of the punch.

Took it to the range today with a couple loads that I use in my Sendero:

1. A 75 gr Sierra HP over 54.8 gr IMR 4350, 3483 fps MV

2. A 117 gr Sierra Spitzer BT over 50.5 gr IMR 4350, 3074 fps MV

Both REM brass with WLR primer.

Weird occurence---it shot the heavier bullet with less powder about 6" higher at 100 yds than the 75 gr bullet. Also threw it higher at 200 yds. :?

This is just the opposite with my Sendero.

It shot the 75 gr bullet about 8/10 ", the 117 gr would only do about 1.25" with this load.

At 200 yards the elevation remained the same, 1.5" above target center, but the groups moved almost 5" to the right. :(

The barrel did heat up after 30 rounds and probably affected assuracy.


:?: Would the fitment of the forearm stock to the barrel affect grouping? It's snug, can't move a piece of .004" between them. Thought about sanding this out for free clearance to 'float' the barrel but it will still contact at the screw baase on the forearm of course.

Any insight as to why this gun shoots higher with heavier bullets and less powder would be much appreciated.

Thanks,