I still use bushing dies on 3 cartridges 338 LM , 7-08 , and 25 Creed. All 3 are FL sizing dies and set neck tension with bushing , no expanding. Bushing numbers down and lightly loose in the die as you described , with no doughnuts.
I used to size the 30-378 Wby with a Redding neck bushing die...
I just used my original disc and it installed without a hitch. After installing I installed the latest update I had on hand. The only thing I don’t care for on my laptop is it does fill the screen like my desktop did.
I’ve tried 3 powders with the 210gr TTSX and RL-17 go me to 2950 fps before I stopped. RL-26 is a bit too slow and Hybrid -100V got me to 2900.
Here is some of Barnes data.
I will test these at higher velocity at some point. I have a 3000 fps load for the 300 Wby , but I may dig out the 30-378 and see if I can turn them inside out.
Thanks to Guy for shining the light on TiteGroup reduce loads on UR , one can test bullets at close range to see how they behave at...
Forgot to add the Garmin photo for the first group.
Today I ran one into water pails , and as expected no expansion on the 220gr RN. Found in the 4th 5gal pail.
For the heck of it I ran a 130gr TTSX into 5gal pails also. Petals were in the first pail and the shank stopped between the 2nd...