The BSA's are junk I managed to break two of them, one on a PPC gun shooting light .38spl, and another on a .22 lr target pistol. I now use two Millet 30 MM reddots on the .22 and a Ruger SB Hunter .44 mag. Both have been working perfectly for over 5 years. Midsouth has them for $78.00. A friend of mine had a Simonds reddot and sold it because the dot flared (distorted) when it was turned up. I'll admit I'm the wrong person to ask about Simonds because I got screwed by six of their crappy scopes(I sold 4, and just threw 2 of them away they were so bad). I would hope their newer products are better, but I'll never know because I won't buy any of their junk again.