Last Saturday I took my 7mm RUM to a relatives house for some long range practice. I need to get in some practice to prepare for my trip to South Dakota this fall. If you've ever been out west there is no shortage on long shots if you are comfortable and prepared. They have a 190 yard target and a 325 yard target to shoot at.
A few months back I sent my 6.5 - 20 x 50 Leupold VXIII to Leupold to have target knobs installed. I also had a BDC (Ballistic Drop Compensator) knob made to replace the target knob. You need to supply information on the load you are shooting and they make a knob with yardage marks to adjust your zero for the yardage you are shooting.
This trip to the range was my first chance to test out the new knobs. I first sighted in at 60 yards and zeroed out the elevation and windage knob to zero with simple allen set screws. I then adjusted the elevation to 200 yards and shot at the 190 yard target and found I was hitting about 4" high. I made adjustments down until I zeroed on the 190 yard target and then reset the knob to just short of the 200 yard line with the allen set screws. I readjusted the BDC knob up to 325 yards and shot at the farther target. WOW, I hit about 2" High and 2" Right. I fired another 4 shots and put them all within 4.25" of each other. Needless to say I'm happy with the results so far. I need to find a range to shoot out to 500 yards to confirm that BDC knob is calibrated correctly.
I still need to finish my 300 WSM load. I'm still testing powders and OAL seating depth for the bullet. But if my 7mm RUM keeps performing like it is I will have a hard time using another gun on my trip.


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ian07:56 AM CST