Bbassi: Both of my Rifles in caliber 218 Bee prefer the Sierra 50 grain Blitz bullets (not BlitzKings!) for accuracy.
One Rifle is a Ruger #1-B with 26" barrel and a Leupold 6x18 variable and the other is a Kimber 82-B with 23 1/2" barrel and a 4x12 Leupold variable.
Both Rifles shoot groups (5 shots at 100 yards) normally just under .8".
I have owned several Winchester Model 43's in both 22 Hornet and 218 Bee calibers - I shot a few of them way back when.
I do not have their reloading information available to me anymore.
But 1 1/2" 5 shot groups at 100 yards with the 218 Bee would have satisfied me back then from those sporter weight guns.
Good luck with your vintage Varminter and be sure to try these nifty little Sierras.
Hold into the wind
VarmintGuy