I just installed my drilled guide rod on my 6.5. I didn't notice any weight difference when installed but it is a lot lighter then the original one. I chronoed before I changed it out and chronoed after and didn't get any fps gains, but it was more consistant over the chrono. I used same barrel, paint, tank and only changed the guide rod. It only took me 2 or 3 minutes so there wasn't any temp differences. Any ideas why it would be more consistant. Anybody else getting the same results?
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