Righto...not going to take peoples feelings into account here...
I Havent ever used an old Parker Hale action, but from my limited experience of 22-250 chambers from that era, chances are those cases/rounds wont fit a 22-250 chamber reamed in the modern Sako/Tikka factory.
Present day Sako/Tikka 22-250 chambers are 2 to 5 thou tighter than every old 22-250 chamber ive tried, so id doubt you'd get the opportunity to close the bolt. (infact i have a few hundred once fired 22-250 cases from a chamber of that era that are 7-ish thou longer than modern Sako/Tikka factory standard that are already showing the ring where case seperation seems imminent in the next firing or so--must've been chambered with Pinocchio's nose...!!)
But even IF you can close the bolt, there's still not really anything to sit on & mull over...if you chamber them & let rip in a new rifle, despite them most likely being "ok" in a modern action built for the pressures generated by modern factory loads, you'd still be considered an idiot,...period...!!
Here's what you do...
Disassemble the bolt & remove the firing pin... very simple task...
Test chamber 3 of the rounds...if you cant close the bolt on them, pull ALL of the cartridges apart & progressively bump them back with a FL sizing or body die until you get 5 of them which the bolt closes on...them lock the die & size them all the same...dont give a hoot about the primers...!!
If the 3 rounds chamber, then progressively chamber all of them to make sure they ALL fit...
If any dont fit, either dispose of them or follow the steps above...
I guess this exercise could be called "saving face"...!!...
There...thats it...ive just coined a new term in the shooting sports...
And dont worry about damaging the bullets...a scrape here, dented or bent tip there...push the ogive out a couple thou longer...doesnt matter...as long as the neck seals consistant & you dont completely obliterate them, they'll still hit a bunny in the head at 150 yds & most certainly pull MOA as long as you can avoid yanking the trigger like you dump the clutch on a super-charged Massey Fergusson in a tractor pull.