LRF,
Lhave a look at some of the threads I started on red dot sights. I narrowed down some good sights or at least ideas.

I really prefer a larger dot in theory. A smaller dot is better for accurate rifle shooting. But for me, a small dog is too small for quick fast sudden close shooting.

One solution for this is a smaller dot inside a lit circle. A 10 or 12 MOA circle. A 2 MOA dot in the centre. At 25 yards that 10 MOA circle is 2.5 inches. 5 inches at 50 yards, 10 inches at 100 yards. A 10 inch circle is probably the size of a broadside chest kill area of larger medium game. Allowing quick shooting, especially close in. Thatb2 MOA dot allows more precise aiming. Also a natural centreing of that larger circle.

I don't know why red dot makers don't use the inverted V dot more. The whole triangle can be larger for quicker shooting, The point of the triangle allows a precise aiming point. Allegedly the triangle is better for astigmatic eyesight.

Off topic to your needs. Instead a comment on FB about use of red dots vs scopes on double rifles which made a lot of sense. Astigmatism, no magnification, for red dots, make them inferior to using a variable scope with an illuminated reticle where the lowest magnification is 1x. Scopes may other a greater range of good illuminated reticles as well. Not just a simple red dot. A lightweight 1-4x scope with illuminated reticle makes a lot more sense than a red dot sight.

A red dot sight that works for the person, makes a lot of sense as a replacement on or for a rear express open sight. A thread is on the forums about grooving the rear express sights of a double rifle to affix a red dot sight. This might be done by a double rifle shooter to continue using the rifle as eyesight lessens. One day I might have removed, the vintage express sights of my favourite vintage DRs. A new express sight added, modified to allow a suitable Red dot sight to be fitted to it. The original express sights kept to allow a return to originality if desired by a future owner. Allowing the current owner to continue using the rifle.

LRF, that last paragraph is very similar to your bolt action plans.