Butch
Thanks foir setting me straight on that. Good info to know. I do recall of reading about that specific problem but its very likely it pertained to the Caldwell coax rest specifically. I have to admit I briefly entertained the idea of buying one of those when they first came out. Reviews were not good and you here very little about them now. Thats as it should be I'm sure.
Phil
From what I gather Hart does not offer a windage adjustable top. I could be wrong but at least the ones in the catalog in your link are not windage tops. I would think they'd put one in there if they have it.
The little screw you refer too is to adjust the bag tension on the stock.
So the Harts are designed for rear bag squeezers.
Windage tops like Sinclair are for free recoil knob turners or bag squeezers too.
My preference would be to go with a Sinclair Windage Top. I'm not sure if you've settled on a particular shooting discipline but the Windage may come in handy if you want to explore short range BR with free recoil.
Light recoiling guns shoot better free recoil for me. Keeps me from botching the hold. Its slower but under certain conditions more accurate "for me"
Heavier recoil requires a hold on the rifle. Where the dividing line between light and heavy is a personal/rifle preference. No hard answers there.
If coax is your thing. Check out the Seb rest. Saves some cash$$$
I know nothing of coaxs so cannot give you a review.
Another option in coax is to buy just a base. Hart Sinclair etc and buy a Farley coax mini top. Less $$$ but still no review
Take your time. Think about now and the future and buy what you think will serve you no matter what type of shooting you want to do.
Don't sweat it to much tho. As Hovis said. Anything but a Caldwell is quality and you will find a use for it even if you upgrade.
By the time you feel your rest is holding you back or not job specific enough you'll have a safe full of rifles its still well suited too. just the facts as I see them