Had some fun experimenting with 7mm loads in my M70 this past Sunday. I have been loading 58.5-59 gr imr4350 with a 150 gr btsp and typically end up with a 5 shot group similar to the following at 100 yds:
Knowing that I should be able to get tighter groups and that I was still below max I decided to try 59.5 and 60 gr to see the difference. I ended up with the following quarter sized 5 shot group with 59.5 gr:
The 60 gr load moved to the right a little and also opened up a little so it seems the sweet spot for my M70 is 59.5 gr. I do not have a chrono or I would post velocities.
I am the original owner of the M70 purchased new in 1976-77. These shots were from a bench with a typical bipod mounted on the front sling swivel and my shoulder at the other end so I am pretty pleased. Shoulda done this long ago ; - )
Knowing that I should be able to get tighter groups and that I was still below max I decided to try 59.5 and 60 gr to see the difference. I ended up with the following quarter sized 5 shot group with 59.5 gr:
The 60 gr load moved to the right a little and also opened up a little so it seems the sweet spot for my M70 is 59.5 gr. I do not have a chrono or I would post velocities.
I am the original owner of the M70 purchased new in 1976-77. These shots were from a bench with a typical bipod mounted on the front sling swivel and my shoulder at the other end so I am pretty pleased. Shoulda done this long ago ; - )
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