The Vanguard is a good rifle by factory rifle standards. The std. plastic
stock has some flex, but some shoot good anyway & some people do fine without touching them. If I bought the standard version, I would definately
have it bedded so that it would be consistant no matter how I held it or
whether or not I used a bi-pod for Western hunting/longer range Varmits.
You mention the Ultra Lightweight & the Sub-MOA, do you know that you can get a Vanguard in MOA version as well? If you do not like to tinker with factory guns or have a gunsmith do so, then it is worth a look. It is
still alot less expensive than all of the Mk V versions. If cost wasn't an issue, the Accumark or MOA version of it if still available has the best features to match the caliber in question.
Concerning your question, will a 24" 257 still outperform (velocity) a 24"
25-06, yes it will. Generally speaking you are looking at about 200 FPS
difference between the 2 rounds with the same length barrels. Both rounds benefit with 26" barrels, esp. the Wea. This is one of the reasons
I decided not to buy the Van. for 1 of my boys. I called Wea. & asked them why the Van. in this one cal. did not have a 26" tube, & the Wea.
rep. acknowledged that the 26" made since, but Howa did not want to
bother with it & that was pretty much the end of it.
That being said, everything is not cut and dried. If you look at the new
Shooting Times Mag. you will see an article on the 257 Wea. by Layne
Simpson. The Vanguard that he tested was actually faster than a 26"
MKV that he also shot. This shows you what can happen with testing a
few rifles, some will have fast barrels & some will have slow barrels, it
happens. However, I have an article one of the Varmit Hunter Mags &
the article in there by Ralph Leymayer (spelling wrong) shows just the
opposite, with a MKV beating a Van. big time. But if you research extensively, you will find that the 25-06 will be 70-100FPS faster & the
Wea. round will be 80-125FPS faster with 26", but again these are general rules.
Also, keep this in mind. If you buy a Savage in the heavy barrel version
or a used Sendero in 25-06, you will be getting 26" barrels & with good
& safe reloads you could be within 100-125FPS of a 257Vanguard. These
rifles have an inherent accuracy edge over the std. Vanguard if you don't
mind the weight & for stand hunting it should not be an issue at all, I carry
my Sendero all day out West, no biggie. That is why that I went to 25-06AI
in my Sendero, I am within 75FPS of a 257Wea. in 26", not enough diff. to
think about, but fireforming is not for most people, but not an issue for me.
The 2 bullets that you mentioned are very good. The 100TSX retains velocity well for a light bullet & the 115 (I like the 120) are great. I use
a 125 Wildcat & it beats them all at long range.
There, a nice short answer like allways.
Good Shooting