the max charge with a 140 was in 1992, 82 gr at 3494 fps, now its 85.5 at 3200 or something close to that. I always used 82 gr. at 3550 in my 26" 9 twist lilja, worked up to 84 gr. at 3640 and lost the pockets, baacked down to 82 and shot that load for years.
well its one of their supposedly extreme temp stable single base powders https://hodgdon.com/wp-content/uploads/2018/06/hodgdon-extreme-series-powders-test-results-for-temperature-sensitivity.pdf
anyone have hodgdon #26, check out the 140 gr load for the STW with
h1000, then go to the reloading data center and check out data with H1000 and the 139/140 gr.
then ask yourself, what did hodgdon do to H1000.
wildcat 200 gr hp's, made by Richard Grove, he sold the company and the new owner let it fall by the wayside, he also made a .257 156 gr. hp excellent hunting bullets.
just putting out information, not bitching about someone else's post! I have saw many times the difference of bullet impacts on game between the 7mm RM and the STW, that 500 fps difference is incredible. Your post makes it plain there is 1 of 2 things going on, either you have zero experience...
160 grr accubond, impact velocity 3520 fps, fired into green sugar maple wood, penetration was 13", expanded to .658", retained 64% of its mass. the cartridge on the left is a 7mm mag. center is a 7mm Allen mag.
look up Gary Reader, done a bunch of work with 405 brass necked down, his line of cartridges was the GNR. perhaps if he is still in business he may sell brass
they started with another case to make the creed, forget what it was. But if you had to make it with what brass you can buy today, the shortest path would be start with a 250 savage
not yet, at 63 will still put my belly in the dirt and shoot off a bipod with rear support if I can't hit my target offhand. but I'm sure that day is coming.
300 savage will work, you can make about anything if the case you start with has the correct casehead size and its long enough. If you have the right tooling. I have a book entitled reloaders guide to cartridge conversions. on a few chamberings the instructions begin with "use a 3/8 brass rod"...
I use a 2x on my hunting pistols for hunting in cover, had a 4x on a 30 herret once, a walking deer was hard to get on at 50 yards, and if he stopped you couldn't pick him out due to small field of view due to too much magnification. have taken several deer and a bear with my 375 JDJ with a 2x...