After many years, I too aquired my first .270 Win. in a Ruger #1 International. What a sweet little mountain rifle. The overall length of the gun is just a fraction over 36" and the Leupold 2x7x33 fits just right.
For deer, I have used factory loaded Hornady 130 gr. SST. The bullet has performed outstanding on all shoulder/body shots and also outstanding on a marginal brisket shot on one deer - the bullet expanded fast enough and well enough that it tore open the chest cavity enough to give a clean kill.
On a So. African plains game hunt last summer my partner and I shot all those large antelope (except eland) with .270 Winchesters. I used my 1954 Win. M70 with Nosler 150gr Partitions, and my pal used his Ultralite Arms (Melvin Forbes) .270 Win. with 130gr bullets. As per the mystique of the 270, they seemed to kill out of all proportion to their paper ballistics. I also used a .338, but it didn't do any better than the .270, and kicks a hell of a lot more.
Next time I'm taking a 7 STW (with muzzle brake), and leaving the .338 home.
I am currently shooting Sierra 130 grn Pro Hunter. Thats just because thats what they had when I started reloading after I moved. I have nearly shot those up and will change to the Sierra 130 grn Game King next. I may try Bergers new .277 bullit when it comes out. This is my pig/coyote/deer/anything else that may present a shot thats legal to take gun.
I'd skip the 130 GmK and go with the Hornady 140 BTSP. Try it with some RL-22 and CCI-200s. I'm bettin' it does well and 650-700 yd shots aren't unreasonable at least at 4500 feet elevation. Down where hogs live it'll do gust as well.
Just my 2 cents.
I may be the slowest guy on the mountain . . . . but . . . . I'm on the mountain!
Roy In Idaho Is Right About The 140 Hornady Btsp. I Load Mine With 56.5 Grains Of Imr 7828 And Have Made One Shot Kills On A Moose, A Caribou, 2 Elk, And Numerous Mule Deer, Antelope And Whitetails, Along With Everything Else I Point It At. I Am Extremely Impressed With These Bullets. Longest Shot Was One Of The Caribou At 515 Yards Longest Death Run On Any Animal Shot With These Was 75 Yards.