My father is in his 70's. Likes to shoot trap but says he has trouble holding up his current gun (don't know model, can get it though). Any advice on a lightweight replacement that's appropriate for the sport?
I would say go with a 20 or maybe even a 28 gage that will be lighter for him and hopefully not recoil too much for him. It may not be the most ideal for trap but if he can shoot, he can shoot. I've shot some 28 gage shotguns that were a dream to shoot, super light and didn't recoil whatsoever.
Advocating shooting the 28 ga presumes the shooter is either financially well off or is a reloader. 28 ga shells sell for $10+ per box even on sale.
My father is in his 70's. Likes to shoot trap but says he has trouble holding up his current gun (don't know model, can get it though). Any advice on a lightweight replacement that's appropriate for the sport?
Unfortunately lighter shotguns recoil harder, so a lighter shotgun may require more lightly loaded shell or different gauge. A 28 gauge or .410 might be required to keep the recoil low enough to shoot a round of trap.