If you are trying to say that a load within (SAAMI)limits and used in
7 1/2 inch barrel wouldn't be safe in 2 inch barrel orvice versa youneed to reread or get a different manualand try to understand it, because chamber pressure is going to be about the same, but velocity and muzzle flash will be very different.
What you are asking is something that only you can figure out for your gun,(NOT ALL GUNS ARE THE SAME EVEN IF THEY ARE THE SAME MAKE AND MODEL)what is safe minimum or maximum load in onemight be hazardous or deadly in another. Example to low pressure could cause the case not expandand seat to chamber wall when fired thus lettingHOT gases back down between case and chamber into your face causing burns to face and eyes.
I do understand OUT SIDE THE BOX AND WORKING LOADS UP OR DOWN (FOR EACH INDIVUAL GUN)and knowinghow to read the signs of to low pressure or going the other way with maximum andreading the signs of to high pressure. (things you should know before you start reloading)
If you read a good manual cover to cover then you would know what
these signs areand you wouldknow how to reload minimum to maximum for your gun.

You didn'task anything about shotshell you asked about reduced load for H 110 and 240 grain hollow pt bullet.
If your manual dosen't list shotshell loads then you need another manual that does because shotshell loads are completly different than bullets, most shotshell loads for hand guns onlyuse mag. primers or very small amount of very fast powders like unique or bullseye. my manual has info, if you would like I could give them to you.

Not trying to start argument or cause aggervation just trying to make point about reloading, a good manual will give youALL the information you need know about reloading, other than maybe which bullet peopleprefer for the game they hunt.

SAFE RELOADING STARTS WITH THE FIRST PAGE OF A GOOD RELOADING MANUAL.