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Old 04-22-2013, 09:40 AM #1
LGT06
 
 
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Join Date: Sep 2011
Break In Time for L7 Bolt ?

I just installed an L7 bolt in my Vibe. I was hoping to see an efficiency gain, but the chrono was reading about the same, perhaps a little slower with the L7 bolt compared to stock.

My fps spread for a 10 shot string went to crap with the L7 bolt too. With the stock bolt I got +/- 8 fps. With the L7 bolt there was one super slow shot that brought my spread up to +/- 20 fps!

I also had a double-feed, which has never happened with the stock bolt.

I'm going to clean up the L7 and make sure there isn't too much grease on it to make sure I don't get any bolt stick, and try different detents and larger paint to try to address the double-feed issue.

How long should I expect it to take for the L7 bolt to be properly broken in? Half a case, two cases?

Thanks.
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Old 04-23-2013, 09:39 AM #2
LGT06
 
 
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It looks like my only issue was too much grease causing some bolt stick. After degooping the bolt I got a higher average velocity and a better spread, +/- 7 fps.

Stock Bolt, Ninja Pro Reg, Lurker .678 barrel, Evil paint

1)268.3
2)256
3)272.5
4)271
5)271.6
6)271.9
7)255.8
8)267.8
9)263.9
10)266.5

Average : 266.53
Spread : 15.7 fps --> (+/- 7.85)

L7 Bolt, Ninja Pro Reg, Lurker .678 barrel, Evil paint

1)279.7
2)278.6
3)280.3
4)274.1
5)285.2
6)273.9
7)274
8)272
9)282.4
10)273

Average : 277.32
Spread : 13.2 (+/- 6.6)

So it looks like the L7 bolt with the stock board gave me about a 4% efficiency boost.

Now I'm going to switch to the Blackheart board with SP/GOG QEV and see how much more efficient I can get my setup and hopefully still maintain an acceptable velocity spread.
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Old 05-04-2013, 06:00 PM #3
vector911
 
 
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Join Date: Jul 2004
 has been a member for 10 years
vector911 owns a Planet Eclipse Geo
Subscribed. I have not had enough field time with my Blackheart L7 combo to come up with a proper dwell.
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