You are likely to get more and better responses if you post your ad in the 17HM2 forum on
www.rimfirecentral.comEley and Remington 17HM2 ammo is the same, except for the color of the plastic tips, and Remington is often a buck or two less expensive than comparable Eley ammo.
Eley discontinued their 17HM2 ammo a long time ago and there are quite a few people who have posted about split case necks on RFC.
I use my remaining stocks of Eley and Remington sparingly to test accuracy potential in new to me rifles and for the 100 to 150 shots that I take at fox squirrels each year.
EDIT: All of the rifles that I've owned in 17HM2 to date have made their best groups with Eley/Remington, so I ration my Eley/Remington to insure that it will last for the rest of my shooting days. I have shot a few hundred rounds of the 15.5 grain Hornady NTX and found that it doesn't shoot as good groups as any of the 17 grain loads in any of the five rifles that I shot it in. I have found that accuracy from both CCI and Hornady 17HM2 ammo can vary from lot to lot. I've only have ammo from one lot of CCI that was consistently accurate, no uncalled flyers, E12Z308, so I only shoot CCI for casual plinking. That said, we all know that every barrel is different and what works well in one barrel might be inconsistent in another barrel.