You don't say anything about what bullets you are using.

I've been loading for the 7 mm Rolling Blocks  since back late the 1960's.  With a 175 grain jacketed bullet I use 39.0 grains of 4320 with good results. One of these years I want to try 4350 as I think the pressures might be a bit lower, but I've had no problems with 4320.  With the 168 grain cast bullet my load is 21.5 grains of 4198.  For brass I have always used sized down MILITARY 30-06.  Use of the heavier brass greatly reduces case mortality with the jacketed bullets.  I've used the same cast bullet load in both rifle and carbine.  Neither of these loads are for target work, just hunting or fun shooting.  Also, while they work fine in my rifle and carbine, you are on your own with what you have.  Caution is advised since I know nothing of the rifle you have.

George
Salmon, Idaho