175 gr Roundnose Hornady bullet, 35-39gr AA-4064, WLR primer, should give you about 2350 fps at the high end.

175 Nosler Partition, 33.1-35.2 IMR-4064, will only give you about 2150 fps at the same MAP.

These are SAAMI loads so no pressure issues.

I haven't dropped a case in the chamber yet to see how large it is.....

Thanks for the info!

SS

I've been using 39 grains of 4320 with the 175 grain bullet for years in my 7mm rolling blocks.  I learned many years ago that the chambers in these rifles are over size.  The original 7 mm Spanish Mauser is a bit bigger than todays standards.  The thing I found was that with factory 7 mm Mauser cases the case mortality was very high.  Because of that, I began making my 7 mm cases by necking down 30-06 military brass.  That really did the trick and cases last a lot longer.  Perhaps a slower powder might improve case life too, but I've always liked 4320 and the load has been very accurate.  You have to realize that the rolling block is very "springy" and no matter how good the headspace is, the cases will stretch and head separations will occur on a fairly regular basis.  But, having said that, I've always been able to remove the rest of the case without anything but my fingers.  Also, you need to stay close to the lower end of thee loads listed in most reloading manuals.

George
Salmon, Idaho

Thank you for the information. I do plan on using the lower end loads. Have a lb of AA2700 so thought I would ask. I also have a lb of imr 4198 and a lyman 160gr mold. Years ago as a young man I had a the 7mm rifle. I lucked out with that rifle. the chamber was a perfect fit. Sad to say that rifle left me many years ago. I just recently replaced it with a cabine. Haven't had a chance to shoot it yet. Thanks again

Tried 35grs of 4064 under a Sierra 160gr Game King. Put 9 in less than 1.5inches at 100. The 10th split the neck and went out of the group. Brass is Sellier and Bellot and know for being hard. As I recall I used to get lots of split necks when I was reloading this brass for bolt guns.

Measured the bases after firing and no expansion to speak of when compared to the unsized cases I have theat were previously fired in the CZ. Probably bump up the charge to 36grs for the next outing...

SS