A lot of the posts on the Fire about this round taught me ONE big thing about the 7x57mm.
What your chamber and throat will preform best at is hardly ever
closely related to most anyone else's. (Mine sure seems to be a freak so far.)
FOTIS posted some quickloads for the 139 and 154s in 2010.....and I saved that for one *ONE* of my references but my 700 Classic has a "mile" of throat. I've yet to find a bullet to reach the lands no matter how little it's seated. His post is helpful to me........but (for me in my rifle) it's not max.
I DO KNOW that when I get the SS custom barrel sitting here on a donor and finished, I'll have to start over.......AND keep loads separate. Throat on that is isn't long at all. The chamber's neck diameter isn't anywhere's close to the SAAMI chamber in my 700 either....which is HUGE.
With H4350 the quick load print out puts 51.7 grains at 60,000 psi. More importantly (for me) the list gave me a little more insight on powder choice "maximums" per se but the only exception I have made from using the "old timey" IMR 3031, IMR 4895 and H380 has been RL-17.......if I really want to push something but with the 7x57mm high end loading is more for fun and games than serious long range loads. Still, it opened my eyes a bit on what CAN be safely done (zero spiking, primer issues, bolt sticking..etc)
https://www.24hourcampfire.com/ubbthreads/ubbthreads.php/topics/3855630/Re_7x57_againThe above advice is spot on. Your rifle may (might/probably) be entirely different so the advice of
STARTING with 7mm-08 load data and working up to what you want is and has been sound advice, for me........but I don't shoot H4350 so...........just sticking this link in for you to take a look but what YOUR rifle's chamber/throat is can easily produce other results. I've zero info on how much Winchester's chambers change, what kind of throat length they have etc. So far, with my rifle, load date is "ball park estimates" at best.
2 cents.
God Bless