So because someone on a message board posted information that disagrees with what you said you feel the need to make a personal attack? That's kind of sad.swirling eddy IF you think sig 365 is a specially developed load along with there m17 your a sucker of sig's advertising . Its not special ammo or even that good at what it does . But hey its your money . Just like many folks with short barrel 9mms prefer 147gr standard over 115gr , its the difference in felt recoil between a pushy feeling and a snappy feeling . I can tell the difference in a 1060115gr load and a 124gr 1300+ fps underwood +P+ load . I guess sig's 365 no good in in a XL or a P320 3.6" xcompact . Ha . I gotten 1213 fps from a 124gr +P gold dot underwood load during testing out of our p365xl .