Mine happened this year, after 15+ years of reloading. I spent almost 2 month (every Sunday at the range) trying to come up with a sweet load for my Remington 700 SPS in preparation for this years deer hunting season. The load I finally settled on was giving me 5-shot 1/2" groups @ 100yds on a regular basis so I loaded up a 50 round box for my trip back home to WV for opening day of rifle season. For some reason a week before my trip I realized that I hadn't actually checked to see how rounds fed from the magazine of gun during my load development so I decided to take it back to the range once more before heading back home. I found that all of the rounds I had been testing for this gun were almost 1/8" too long for the magazine area of this gun and for me to use this load it would now be a single shot rifle. I decided to push 20 of the 50 bullets back far enough that they would fit properly in the magazine and visit one of the local ranges in WV on Sunday before opening day to see how they performed. I guess I lucked out as the rounds still grouped at 1" @ 100yds. Only thing left now was to find a buck. Needless to say I only saw 15 does, a dozen turkeys and gave up on counting the number of gray and red squirrels (the red ones were so fat this year they sounded just like a deer). Oh well, guess it's time to start preparing for next year