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Old 12-08-2018, 06:56 PM   #11 (permalink)
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An underbore won't be enough to get you up to speed, do like the people say and put a heavier main spring in.
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Old 12-08-2018, 09:04 PM   #12 (permalink)
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Yeah your marker should be able to hit 300fps without fiddling with bore size easily. Is the green valve spring the lightest you have? If so the heavier main spring would be the way to go of course. OR a heavier hammer.
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Old 12-08-2018, 09:53 PM   #13 (permalink)
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A green valve spring is about as light as they make.

I gotta disagree with y'all; bore size is very important here. If you are getting partial rollouts your velocity suffers big time. Make sure that isn't the issue before you do anything else.

After that, yeah swap to a different hammer spring.
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Old 12-09-2018, 10:13 AM   #14 (permalink)
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Alright guys I will try again after Christmas when I should hopefully be getting my tanto barrel and freak kit. I just thought it would be really weird because alot of people use the blue green combo like i have and seem to not have any problems. Also i noted that turning the ivg in didn't have any real effect on velocity. Like the first shot after adjustment would be higher (260) but every other shot would still be in the 240 range.
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Old 12-09-2018, 10:37 AM   #15 (permalink)
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Try shooting with the barrel uphill and that might help prevent partial roll-outs...
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Old 12-09-2018, 05:10 PM   #16 (permalink)
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Try shooting with the barrel uphill and that might help prevent partial roll-outs...
Rollouts aren't the problem, velocity is. I have a barrel detent thing.
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Old 12-11-2018, 07:46 AM   #17 (permalink)
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Alright guys I will try again after Christmas when I should hopefully be getting my tanto barrel and freak kit. I just thought it would be really weird because alot of people use the blue green combo like i have and seem to not have any problems. Also i noted that turning the ivg in didn't have any real effect on velocity. Like the first shot after adjustment would be higher (260) but every other shot would still be in the 240 range.
Bore match will help you figure out your consistency, but you need a stiffer spring. I've tried a million things that weren't the spring to fix the issue you are describing, but sometimes, for whatever reason, you just need a stiffer spring.
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Old Today, 04:47 PM   #18 (permalink)
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Let's see a pic of the springs you're using. There was a spring kit sold on Ebay for years, they sold thousands of em, had high gloss paint. Anyways, green, blue, and red were all the exact same spring rate when I tested them. Valve spring was much too heavy. Could be your problem, here's an example of the crappy springs, accidently listed as Maddman here: https://www.ebay.com/itm/MADDAN-AUTO...p2047675.l2557
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