There is a difference in shooting a PPC or a 300 WSM in terms of being hard on a scope. The 1000 yard BR guys use a brake also which doesn't help any scope. MattIf you had 4 March's fail Steve, this is very uncommon. I not saying that they don't fail, but it's among the most reliable scopes as far as BR goes. Leups on the other hand, well lets just say that I've see 2 more this year fail on people that I shoot against which makes it 10 that I've see fail since I first started shooting in 2013. I wouldn't give you a plug nickel for a Leup Comp scope. I've have been told by a dozen people that I shoot against that their 15-55 NF comps have given up on them. One of the guy's had to send his back twice within 3 seasons. The only scope that I've never heard anyone bad mouth has been the Valdada 36. I've owned 3 of them, still have one left and I think they are fantastic scopes. I'm sorry you had such bad luck with your Marches. I have 5 left and I haven't had a lick of trouble with any of them.