Ok so I got a brand new tikka t3 7mm-08 ss. Took it to the range the other day to get it all sighted in with a box of federal fusion 140 grain. I got it sighted in I thought. Shot 17 rounds through it all letting the barrel cool between shots. Best group I could get was 5 inches. I thought what is going on here people say these guns shoot anything. So I come home took the stock off adjusted the trigger and torqued everything back on the stock. Checked my scope torque also. Barrel is floated all the way till the pressure point about half way down this is a normal thing so I here. Then I clean the barrel really good. Take it back to the range today no wind of anything first shot dead center just top of the dot. Let barrel cool for 10 min next shot just under the dot. I thought well this isn't bad been better than it has shot so far. Let cool then shot the 3rd shot it was 4 inches low. So what the heck is going on. Like I said very first shot was dead on just a tad high in the dot. Anyone got any ideas why it is opening up. Thanks
