If 125 grain loads are providing good accuracy and provide a more comfortable shot, I would definitely stay with them. I've never lost one to 100 grain loads in both my .243 and 25-06.

We have killed over 200 deer hogs antelope and even an elk using 120 gr AMax or ELD-M bullets in the 6.5 CM so I wouldn’t be worrying about the need for 143’s.

143 gr eld-x from Hornady.

Well he got it done first thing this morning for his first hunt ever. 143 gr was a little bit much for him during zero so we picked up a box of 125 gr Winchester Deer Season XP. Double Lung shot and dropped on the spot. He will be ready for the 143 gr during summer when he will shoot more and be ready. Oh by the way. Big 8 comes in and he asked if he could take the spike instead so the 8 could grow bigger. For the first hunt and only being 13, this little hunter has a great mind set.

Considering getting one for myself but not sure about recoil. I have a bad neck and was wondering how the 6.5 is?

The 6.5 I picked up with the 125 grain kicks like a field mouse would if a field mouse kicked you. Very little recoil and accuracy is pretty dang good.