Explain this one to me.

[Redmt]

I'm working up a load for my 6.5 CM #1. I'm not seeing the groups I expected so I'm searching. I'm going to start messing with seating depth next. I have a Predator that I have a great load for so started there. The chambers are within a few thousandths. The Predator likes a .050 jump with the 120gr. TTSX. The #1 the groups open up to about 1.25". For giggles I measured some Vortex 120gr. TTSX ammo I have and they would only have about .020 jump. The biggest difference is that the factory Barnes and the reloading bullets are a different bullet! Anyone have any input on that?

 

[D4570]

Try a different powder? Copper bullets like to be pushed FAST.

 

[Redmt]

I have not run across the chronograph with the #1 but the same exact load with same jump in my Predator is pretty consistent at 2850-2870

 

[Addicting]

Every rifle, bullet, powder, and primer combo is different. You can’t compare it to anything else and expect it to be the same. You start from scratch on each rifle.

 

[Redmt]

Every rifle, bullet, powder, and primer combo is different. You can’t compare it to anything else and expect it to be the same. You start from scratch on each rifle.

I think you missed the question. But FYI, every new load for a new rifle has to start somewhere. My somewhere was with a known, safe and accurate load I have used for years in a different 6.5. I didn't expect the same results although it would have been nice.
You have to start somewhere and using a load that hasn't killed me yet was my starting point.