3/4 at 100 is not a deal breaker for me I have had many tighter groupings at 100 but watch them open up at 200 or 300 yards.
Try the loads at 200 yards and see if they still keep in a 3/4" group.
May surprise you.
One thing i watched a guy do was use the (side focus) as a focus.
I hate that they call it side focus as that is not what it is at all.
It is seen on some higher power scopes to adjust to eliminate parallax.
Not a focus for parallax but an adjustment to make your cross hairs or reticle not move off the point on the target when you move your head back and forth.
Some scopes are preset and some have the adjustment on the far end of the scope.
You know what I am talking about here.
Focus is adjusted after Parallax is adjusted.
I had one guy beside himself because his 100 yard groups looked horrible.
Using parallax adjustment to focus.
His focus ring was cranked down so tight it took both of us holding the scope and rifle to get it to turn.
He swore up and down the focus ring was not a focus ring and the Parallax was focus.
1/4" groups at 100 after I explained it to him and got the focus ring working. Rifle was a 6PPC.
Another thing is a very steady hold as you know.
If you can't keep the reticle planted in place on the target do not pull the trigger.
Fix the rest or fix yourself to hold better.
I have one friend that can't hold on point so he slowly sweeps across the point on the target and pulls the trigger when he gets there.
His groups are not very good.
But he puts meat on the table.
Try the loads at 200 yards and see if they still keep in a 3/4" group.
May surprise you.
One thing i watched a guy do was use the (side focus) as a focus.
I hate that they call it side focus as that is not what it is at all.
It is seen on some higher power scopes to adjust to eliminate parallax.
Not a focus for parallax but an adjustment to make your cross hairs or reticle not move off the point on the target when you move your head back and forth.
Some scopes are preset and some have the adjustment on the far end of the scope.
You know what I am talking about here.
Focus is adjusted after Parallax is adjusted.
I had one guy beside himself because his 100 yard groups looked horrible.
Using parallax adjustment to focus.
His focus ring was cranked down so tight it took both of us holding the scope and rifle to get it to turn.
He swore up and down the focus ring was not a focus ring and the Parallax was focus.
1/4" groups at 100 after I explained it to him and got the focus ring working. Rifle was a 6PPC.
Another thing is a very steady hold as you know.
If you can't keep the reticle planted in place on the target do not pull the trigger.
Fix the rest or fix yourself to hold better.
I have one friend that can't hold on point so he slowly sweeps across the point on the target and pulls the trigger when he gets there.
His groups are not very good.
But he puts meat on the table.