Eldon I had originally planned on getting A 577 nitro But then I got ahold of the Gunsmith Ed Hubel and he turned me on to his 585 HE . It is 500-600 fps faster than the 577 nitro express . same bullets (.585) . theres also the 600 overkill . Ive learned get whatever caliber you can get brass for in these big bores . Im setting mine up as a prone position rifle its going to be really heavy probably over 15lbs maybe 20lbs . You could build a 577 on a sxs shotgun action . kynoch 577 nitro ammo is only loaded to 35k psi or so low pressure really . I had a dangerous game hunter tell me the 577 calibers can over penetrate and hit a animal you didn't intentionally want to pay for . Like he was on a cape buffalo hunt and took a broadside shot with his 577 and it passed completely through and went into another and the bullet stopped in the hide on the far side of the second cape buffalo ! My 585 He cases are only 3$ a case which isn't bad since they almost last forever and theres a good supply . Oh yeah you can use gibbs cases to form them by swagging a belt onto the case but gibbs brass isn't made like cheytac/HE brass , not as thick in the web area .
I got 2 weeks or so and my Edwinson 10 ga will be here cant wait to see her . I mainly got it because I read Edwinson was a well known gunmaker and I don't ever see any of his doubles for sell . probably because they made guns in low numbers . like mine is only serial # 34xx . unlike Americans shotguns from the same period in the 100k range serial # . I prefer I brit guns I guess
