my bolt was badly worn, so contradictary to what I said earlier, I bought the Trinity Sick bolt, on the crono I was shooting 265 to 270(comfortable for me because I tend to ambush)with the stock bolt.
with the sick I was shooting 345 to 350, that little oring gave some improvement for sure.
after dialing the velocity back to normal and playing a day of ball I noticed I could shoot more on my 68/3000 than with the stock bolt, about a hoppers worth more.
I hope this lasts for awhile.

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