Reply To: FX IMPACT: First Video – Changing C3 Bumper

Forums PCP Airguns FX IMPACT: First Video – Changing C3 Bumper Reply To: FX IMPACT: First Video – Changing C3 Bumper

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jking
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Edosan,

I used your video yesterday and replaced the O-ring with a Delrin bumper that I made on my lathe. The process was very easy and took about 10min to install. I regained the velocity that seemed to have dropped off. As tune it was shooting 44.75gr 30s at about 905. After installing the Delrin my first shot was 947fps but then it settle at 935 for the next few shots. I was wondering what effect a thinner or thicker bumper might make? The O-ring measured out to about 1.8mm the bumper I made was a little thinner at just under 1.5mm. Of course the original being a softer material probably netted less actual benefit. Anyway thanks for all the Impact information you have graciously shared.