changing factory ammo - no time to go to range

gun 22-250 savage model 12 BTCSS 1-12 twist. it is a varmint 26 inch heavy barrel.

Store ran out of the ammo that i sighted in my gun with.
it was 55g federal powershok soft point and was .25" at 100 yards and 3/4" at 200 yards.

i have other choices of ammo to take with me to the field. unfortunately i have not tried any of these before and am going to go out in the mornign to try calling in a dog.
45g winchester white box cheapy stuff
55g winchester balistic silver tip
55g hornady vmax
55g remington umc
50g hornady vmax
50g hornady superformance

i am sure that i will not be bang on, but will i be close out to 200 yards. yes i know each gun is different but does anyone have any experience with changing loads and how big a difference it makes on the 0-200 yards.

of these does anyone have any idea as to which one might be a good comparable one.

gun 22-250 savage model 12 BTCSS 1-12 twist. it is a varmint 26 inch heavy barrel.

has anyone used any factory ammo with this gun and what where there results.
i have used
55g federal powershok soft point and was .25" at 100 yards and 3/4" at 200 yards.

i have other choices of ammo from our local stores - if you have any experience with these in that gun or the other heavy barrel gun please in the 26" 1-12 twist please let me know.
45g winchester white box cheapy stuff
55g winchester balistic silver tip
55g hornady vmax
55g remington umc
50g hornady vmax
50g hornady superformance

i know each gun is different but it does give a general idea
also, with any of the above ammo have you 'chrony'd it and how much different is the 26" barrel vs factory printed data. and again i know that temperature, elevation, pressure all make a difference.

once is sufficient.