'It's pretty special and hard to describe, but I feel really good about it,' said Reynolds, 55, of Grand Blanc, Mich.
Reynolds built a quick 2-up advantage over Bemowski with a birdie at the par-5 fourth, but faltered with a bogey at the par-5 sixth to finish the front nine with a 1-up lead. However, Reynolds picked up steam on the inward half.
At the par-4 10th, Reynolds knocked his second shot on the green and two-putted for par to win the hole after Bemowski missed the putting surface with his approach. Reynolds nearly found trouble at the following hole after he found a greenside bunker, but blasted out to get up and down for the halve.
'I almost didn't hit that shot, because that was a shot where there was only about six inches where you could land that ball,' said Reynolds.
Reynolds continued to pull away with a birdie at the 13th to go 3-up. After Bemowski bogeyed the 14th, Reynolds was dormie with a 4-up lead.
The title was secured for Reynolds when both players parred the par-5 15th.
'The last few days, I really putted well on some really crucial putts,' said Reynolds, who ousted Curt Madson to reach the final. 'Ordinarily my putting isn't a strong part of my game, but I thought I putted very well here.'
Bemowski, who struggled with the putter throughout the match, could not say the same about his game.
'I've been battling it for several years now, and it really manifested itself today,' said the 56-year-old from Mukwonago, Wis. 'I've really struggled on these greens, with the speed particularly.'
Reynolds entered the field as an alternate four days before the start of the championship. Along with a gold medal and the possession of the Fredrick L. Dold Trophy for one year, Reynolds was also granted exemptions from local qualifying at the next U.S. Open and exemptions from sectional qualifying at the next two U.S. Senior Opens.
The U.S. Senior Amateur, one of 13 national championships conducted by the United States Golf Association, is open for amateur players 55 years and older.