I was within 75 fps of that with 140 gr Hornady out of a 22" barrel in the plane jane .270 Win. (Remington Mountain Rifle). That is a 2.5% difference in velocity.QUOTE]
I don't reload, but when i thought about getting into it had a few guys recipes out of their tikkas/sakos and they were way hotter than what i'm shooting...into the 3300's so tit for tat pretty sure we're still talking at least 20% difference. By sounds of it a lot of guys talking about ammo availability in this thread so guessing more than a few here don't reload either. I specifically try to avoid reloading on principle of being different.
I bowhunt like a mofugga also...so there are only so many aspects i can get into and still have a life....luckily for me with todays modern ammo's and a decent selection of well built/accurate firearms that finding sub-moa performance isn't that difficult....this made my decision to not reload so much easier as i don't benchrest or compete...i hunt and moa of coyote to 800 yrds is good enough for me.
Whats case capacity difference in percentage again? When i researched this out a couple years ago running every number you could run it was approx. 20% faster, hit same energy levels 20% further, all around it was just 20% more cartridge...recoil too i'm sure....i think it ran between 20 and 25% but lower 20's most of the time in my comparisons.
Here we go, quick google and first link i opened.....case capacity full of water 67.1 grs .270, 80.1 for wsm grains....67.1 x1.20 = 80.52....then right below that in the same google we get 130 gr hornady seated to proper overall length and got 63 grains into the .270 and 75 grains in the wsm...63 x 1.20 = 75.6...i believe the guy was still using water to demonstrate case capacity differences?
So apples to apples its a .270 plus 20 points