Not to hijack but is it possible to add a removable mag to the vanguards and Howard rifles? How difficult is it or what do you need to buy. Is it reliable?
Yes. There is an aftermarket "kit" made by ATI and sold through Legacy Sports.
IRUN Guns, one of the site sponsors carries them and their prices are better than buying direct from Legacy (130 to 150 Canuck bucks for the kit - spare mags are around 70 bucks (I think, but don't remember for sure)
They will fit Vanguards, Vanguard II's, Howa 1500's and Mossberg and S&W model M-1500's (all Howa actions).
As of right now (last week according to Legacy) they are available for short action (308 family - 243/7.08/308), long action (30.06 family - 25.06/270/30.06), 6.5 Swede, 22-250, 204/223, 300 Win Mag, 338 Win Mag/7MM Rem Mag - nothing for Wby mag calibers.
They can be ordered with either a 5 or 10 round mag and include a trigger guard - so you basically remove the old trigger guard and the internal mag "guts" and screw the new one in.
Since even the smaller mag holds 5 rounds it does stand "quite proud" of the bottom of the rifle, not the "close to flush" that you would get with a factory detachable mag set-up.
I have used the kit on two of my short action Vanguard II's - works great, takes all of 5 minutes to do the swap.
I do prefer the factory mag "if available", however, many of the Vanguard models never were available in DBM models, so this is the next best thing.
And for Rem 700 fans, ATI has just put out a full line of these kits for Rem 700's in the same caliber offerings as those for the Howa 1500's.