Yesterday, I received my first 100 pieces of Hornady 458 Lott brass and went to load a few round. They would not go into my RCBS #4 shell holder . I've got this holder in 1973 for my wby, never any problems there. Has anyone else ever had problems with shell holder that were supose to fit but did not??

I have never loaded straight wall cases before and had difficulty attempting to trimm the cases...The cases mouths are undersized ...measured them at about .435 or so. I attempted to trimm them both before and after sizing with Hornady dies...What do you do to trimm 458 Lott Brass.

The brass looks to be quality. I cleaned up the primer pockets and flash holes, both of which needed work. I checked wt. of the Brass after and got the following results:

60 cases 249.7 to 250.6 grains
30 cases 248.8 to 249.6 grains
6 cases 251 to 251. 8
1 case 247
2 cases 255+
1 case 243, measured length of this case was 2.58".

Overall I was impressed with the quality and the price.

I would appreciate any tips and help in reloading straight wall cases/ 458 Lott...Thanks JJS