20 vs 28 gauge

[Altitude sickness]

I switched to left hand with my traditional bows decades ago, and I can throw a ball left-handed so maybe I’ll just give shooting my right handed shotgun from the left. Oddly I’ve actually never done that. The Westley Richards has 1/4” cast off is that too much to give left-handed a try?

 

[shootist~]

I do tend to squint my left eye, but as you know, that impacts depth perception

Closing one eye also affects the other eye to some extent (IMO) and obviously kills half of your peripheral vision. Everyone is different, but the piece of tape over the dominant eye trick worked best for me over a few decades of registered skeet, plus some sporting clays, trap, etc.

Working with a certified (and well known) instructor is worth it too, but I've never been aware of one that specializes in cross eye dominance. Certainly worth checking into though.

But the first step IMO is to get on the pattern board. Its amazing how much better a shotgun shoots if it's fitted to you correctly.

 

[rookhawk]

I switched to left hand with my traditional bows decades ago, and I can throw a ball left-handed so maybe I’ll just give shooting my right handed shotgun from the left. Oddly I’ve actually never done that. The Westley Richards has 1/4” cast off is that too much to give left-handed a try?

Way too much. That would half the distance between your pupils + 1/4" plus whatever cast-on you need, perhaps another 1/4". That's a very strong angle of deviation.

You can always have the stock bent and the trigger tang reworked and the triggers bent to lefty. <$1000 all-in, to your measurements.

 

[shootist~]

If you do the tape trick, it's exact location will need to be adjusted by trial and error.

It's helpful to stand in front of a mirror while mounting the shotgun. Crawl the stock a bit like you would in the field, to lock in the rear sight - your Rt eye.
My stock fitter called this "doing the turkey-neck".

When the tape is set correctly and with both eyes open, you will see down the rib with the right eye while the left eye is perfectly blocked (no rib). (Otherwise you see two ribs, and the POA shifts as you close one eye at a time.)

Example of a good tape to use:

Amazon.com

 

[Tex .416]

If you do the tape trick, it's exact location will need to be adjusted by trial and error.

It's helpful to stand in front of a mirror while mounting the shotgun. Crawl the stock a bit like you would in the field, to lock in the rear sight - your Rt eye.
My stock fitter called this "doing the turkey-neck".

When the tape is set correctly and with both eyes open, you will see down the rib with the right eye while the left eye is perfectly blocked (no rib). (Otherwise you see two ribs, and the POA shifts as you close one eye at a time.)

Example of a good tape to use:

Amazon.com

A very light dab of chapstick smeared around is all that is needed.