Welcome to the old guy's club, 78 here. Yes, the Kahr's are difficult to rack because they use 20lb recoil springs which are intended for recoil absorption and timing. I replaced the 20lb springs with 18.5lb springs in my K9, MK9 and PM9. They are available through Wolff springs. I'm not saying the 18.5lb spring will make the effort to rack the slide easy, but rather slightly easier. The 20lb spring is definitely an over kill on Kahr's part. I also replaced the factory 6lb striker springs with a 5lb springs also available through Wolff. Trigger pull is now under 5lbs for all three of my 9's without light strikes. I've measured pull between 4-5lbs. The combination of reduced recoil and striker springs will fundamentally make racking easier but, again, not easy. BillACP's method is also recommended.
My Kahr guns are carry pieces not range guns where racking the slide is frequent. I manage to rack the slide, chamber a round and put the gun in the locker where it sits until I chose to carry a Kahr for the day. When I do, it's ready to go. I only occasionally shoot my Kahr's at the range for proficiency or to test new loads and/or upgrades.
Lastly, watch for broken tabs on the magazine followers. These polymer tabs extend down into the magazine and guide the follower as it moves up and down inside the magazine. If they are broken, the follower will likely jam. I've replaced the polymer followers with metal versions available through Kahr and Lakeline LLC.
By any measure, these Kahr guns are brilliantly engineered and well worth the expense of any upgrades.
CW45, K9 Elite '98, PM9, MK9