I own the scope you are talking about from primary arms 4-14x44. for the money its gets the jobs done. A nice intro into shooting at distance. The structure and build of it is really good quality. But I will not play up with the glass quality. Starting at 4 power and moving up to 10 power is very clear. After 10 power you will start noticing some side distortion. There are higher versions of the scope in the Platinum line that address this issue. It’s rock solid and the turrets can track really well. I am using a american defense QD extended scope base mount. It is a bit difficult to get it level within the mount from a design point. But once you have your scope crosshairs parallel with the rifle bore it is just a simple process of tightening to spec and being patient.
One of the most important things when using the BDC is to know your rifles Barrel twist and the grain weight of the projectile you’re using. I neglected this fact and was using 55 grain and in a 1 in 7 twist Barrel. You can obviously imagine the catastrophe at a hundred yards. Once I bumped it up to 69 grain and soon to 75 grain in the future. It was dead on and had a repeated point of impact within 1.5 MOA. Other groups were tighter but that was probably due to my Barrel getting hot and not having the barrel be copper fowling cleaned out.
If you ever feel that you are in trouble always go to the manual. If you have doubts go to the manual it will save you time and tears and not having yourself sound like a idiot on the phone explaining to customer service how their scope is the problem and not yourself LOL