Someone says it can just make a difference on the range more than 300 yards, so how about the pcp airgun ? Does it necessary for the trajectory?
http://www.amazon.com/Discovery-Optical-Anti-cant-Riflescope-Hunting/dp/B019FBBEWC/ref=sr_1_2?m=A16JBFMU238KQO&s=merchant-items&ie=UTF8&qid=1450262459&sr=1-2
http://www.amazon.com/Discovery-Optical-Anti-cant-Riflescope-Hunting/dp/B019FBBEWC/ref=sr_1_2?m=A16JBFMU238KQO&s=merchant-items&ie=UTF8&qid=1450262459&sr=1-2