Ok guys/gals I'm new to this site and I'm sure this has been asked numerous times. I just bought a Predator Max 1 in 260 and I will be mounting a Bushnell Elite 4200 4-16x 40mm with adjustable objective. The scope is a few years old and has the objective adjustment on the bell not the newer side focus style. I have decided to go with the Talley 1 piece ring/base in medium height(?). After emailing Talley I'm more confused than ever. Talley stated I would need the model #94X725, which are the 1 piece medium "extended". After doing a cross reference I noticed the 1 piece medium, for round receiver accutrigger, Talley #940725 and 94X725 "extended". Does anyone know what the difference is with "extended compared to the "non-extended". Thanks for any help.