I had a Winchester NRA model 1300 Defender in the rack for years, never had to use in anger but have recently swapped it out for a 2nd hand Beretta 1201FP which I would most definitely trust 100%
I had it out for our Xmas Clay Bird Flurry last month and it was flawless with around 450 rounds through it in a few hours, they were light target loads too so would imagnie it would also be more than 100% reliable with stouter buckshot and slug rounds etc...
Kicks like a mule though