Anyone have any experience with this caliber. I have a chance to pick one up but from what I read it’s a pain to make brass. The seller says fire 150gr factory 30-06 but everything I find says that’s a bad idea
I have a 25-06 in a Gibbs Mashburn that is quite a bit more work to make brass, necking down 270 or 30-06 brass and then fireform, pretty potent rd for a 25, using 90-120 gr. bullet's. All brass was fireformed using Red Dot powder.
Only draw back is brass prep. I have a 6.5 Sherman which is similar and based on the 270 Win. Neck down and create a doughnut on the neck for a false shoulder. Some pistol powder and cream of wheat to fire form. The design does perform. My Sherman will drive a 140 Berger at 3339 fps out of a 28" Hart.
I'm very impressed with the numbers from mine, running even with 300 win velocity with a 200gr. That is out of a 30" barrel though. For brass prep I had a whidden hydraulic form due made, couple wacks with a hammer and you've got a 90% formed case. Easier than messing with a false shoulder or cream of wheat.
I have the 270 , 30 & 8mm Gibbs. Fire formnig 30 06 brass is fairly easy. All I do is put 5 gr. of red dot and fill the casing with cornmeal with a touch of lube
on the top to keep everything in the case. This bumps the shoulder where it needs to be. I then check over all length and trim if necessary. I then load a full load the next time around and start shooting. I got great numbers from all the Gibbs cals.