A while back, I was issued this challenge:
Take your favorite hunting rifle/s, place a six inch circular target out at three hundred yards in such a way that you can't tell if you hit it or not and fire five shots at it before you go look at it.
So, today I decided to make my attempt and share those results no matter how embarrassing. The rifles in question were my Sendero SFII in 300RUM (180 grain Accubond at 3270 fps) and 700 Classic in 7mm Rem. mag. (150 grain Sierra boat tail at 2950 fps) As these rifles only hold three in the magazine and one in the pipe, I fired three shots instead of five, figuring after I miss three shots on a game animal it's going to be over the hill and far far away.
Here are the targets. They were fastened to the framework using, what else, baling wire. As I don't have a range finder, my means of measuring 300 yards was a bit crude. I drove back up the two track road .2 of a mile and allowing for the "jog" in the road I figured I was "close" to 300 yards. I set up using shootings sticks sitting with my back against the rear tire of the pickup to more closely simulate an actual hunting situation.

I failed to take into account the heat waves would make even seeing the target through the scope nearly impossible, let alone they were very similar in color to the back ground, but the test must go on.
First, the 300RUM. Point of aim was center of target knowing that it's "zeroed" at 300 yards.

Looks like I could move it right a couple clicks, but not bad.
The 7 mag. Point of aim was top center of target knowing it's zeroed at 250 yards and should hit about three inches low at 300.

RUH ROH!
With only one shot on the target and it being low, I was sure the other two were also low, so I went back and got some cardboard and a couple targets to see just where the 7 mag was hitting. I didn't take pictures (way too embarrassing) but the group was "large" and a good six inches low.
Here's how the targets looked through the old steel tubed Texas K8 Weaver on the 7 mag..

I'm going to go back Sunday morning in hopes of beating the heat waves and shoot groups/sight in again and have another go at the six inch targets. Trying to sight in today was a waste of time, ammo and patience.
RJ
Take your favorite hunting rifle/s, place a six inch circular target out at three hundred yards in such a way that you can't tell if you hit it or not and fire five shots at it before you go look at it.
So, today I decided to make my attempt and share those results no matter how embarrassing. The rifles in question were my Sendero SFII in 300RUM (180 grain Accubond at 3270 fps) and 700 Classic in 7mm Rem. mag. (150 grain Sierra boat tail at 2950 fps) As these rifles only hold three in the magazine and one in the pipe, I fired three shots instead of five, figuring after I miss three shots on a game animal it's going to be over the hill and far far away.
Here are the targets. They were fastened to the framework using, what else, baling wire. As I don't have a range finder, my means of measuring 300 yards was a bit crude. I drove back up the two track road .2 of a mile and allowing for the "jog" in the road I figured I was "close" to 300 yards. I set up using shootings sticks sitting with my back against the rear tire of the pickup to more closely simulate an actual hunting situation.

I failed to take into account the heat waves would make even seeing the target through the scope nearly impossible, let alone they were very similar in color to the back ground, but the test must go on.
First, the 300RUM. Point of aim was center of target knowing that it's "zeroed" at 300 yards.

Looks like I could move it right a couple clicks, but not bad.
The 7 mag. Point of aim was top center of target knowing it's zeroed at 250 yards and should hit about three inches low at 300.

RUH ROH!
Here's how the targets looked through the old steel tubed Texas K8 Weaver on the 7 mag..

I'm going to go back Sunday morning in hopes of beating the heat waves and shoot groups/sight in again and have another go at the six inch targets. Trying to sight in today was a waste of time, ammo and patience.
RJ