D********it man,...you stripped the heck out of that barrel,....sounds like it did when it was brand new huh?!?!? Yes, I've experianced the say as well,...velocity gain. Luckily for you it didn't effect your accuracy,....most folks can't say the same from what I gather. I would not be very concerned with spring fatigue at this point,...Put another 2000 rounds through her and let her slow down some. Mid to High 800's to low 900's is an ideal velocity for the most part. Then just "buff" the barrel with a patch,...or two!!!!!"Leave a little in there" if you get my drift. Sounds like you've got a hot-rod shooter for sure!!!! tjk