Rate Of Fire

Tac401
Administrator
Posts: 253
(3/15/01 9:17:51 pm)
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Any fellow full auto folks have any suggestions on how
to slow down the rate of fire on a UZI in 45acp. caliber?

Tac
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Alphamale
Senior Chief Moderator Staff
Posts: 69
(4/8/01 8:54:19 pm)
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Tac, just had a thought(which is dangerous when I do it b/c something usually gets broke and/or blown up), how about moving to a heavier recoil spring? Or handloading some light target loads with 185gr bullets?
If guns are outlawed, can we use swords?

Tac401
Administrator
Posts: 567
(4/8/01 9:09:06 pm)
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Re: Rate Of Fire
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Alpha,

I don't want to really use light loads, I still would
like to use combat loads, there is a way to do it but
it's a pain in the ass, I was thinking the same thing
as you mentioned with a heavier recoil spring but it
takes a different type spring than the semi auto gun
does but I may try a modification to one of the original
springs, if not I'll have Andrewski do it, he's about
the best there is in class 2.

I love it on 9mm but 45 is wicked fast when I switch
over.

Tac
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Tac401
Administrator
Posts: 925
(5/13/01 5:10:04 pm)
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Re: Rate Of Fire
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well, my son Jonathan and myself recently took the
UZI out for a test run of slowing down the 9mm rate
of fire and one simple way that was effective was to
use standard target ammo instead of Sub-Gun high
pressure ammo.

The target ammo seemed to slow it down to around 400rpm.
and we were actually able to perform single and 3rd.
burts while having the selector on Full Auto.

We used 3 different brands of ammunition to run our
test with, of the 3 brands we used American Ammunition
CO. 115gr. FMJ, PMC-115gr. FMJ and UMC-115gr. FMJ.

Out of the 3 brands tested 2 of them failed to perform,
American Ammunition gave us 1 dud and 2 jams & PMC gave us 1 dud, the UMC ran flawlessly.

Tac


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Mike 400
Member
Posts: 1
(3/22/02 11:43:26 pm)
Reply | Edit | Del How fast would you say the RPM is...
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In the .45?

cpermd
Member
Posts: 7
(3/31/02 12:55:29 am)
Reply | Edit | Del 2 ways
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Increase spring strength
Increase wt of bolt.
Not much else in a 45 to do
cpermd

Tac401
Administrator
Posts: 4018
(3/31/02 1:34:54 pm)
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Re: 2 ways
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No way to increase weight of bolt to my knowledge?
The 9mm is fine where it's at, my main concern is
to slow down the ROF of the.45acp, it's so fast
that you can't really do a proper burst with it, I
was wondering if as you suggested a little higher
spring tension would do the trick, or maybe a custom
heavier spring might work?
TFF VMBB Email Tac

cpermd
Member
Posts: 10
(3/31/02 2:31:20 pm)
Reply | Edit | Del Bolt
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I have seen a bolt that had Mallory metal that auto machine shops use to balance crankshafts added to it.
They milled 4 slots and then added the metal.
cpermd

Tac401
Administrator
Posts: 4024
(3/31/02 5:08:31 pm)
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Re: Bolt
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If you find out who can do this for me or where
please let me know.

Thanks!
TFF VMBB Email Tac

cpermd
Member
Posts: 13
(4/18/02 3:28:25 pm)
Reply | Edit | Del Bolt wt
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OK
I have done some tracking.
It was done by a shop in Springfield MO that balances cranks and does block work for AA and Top Fuel Dragters.
The key is they balance crankshafts and use Mallory metal.
Find a Racing engine shop that does cranks.
cpermd

Tac401
Administrator
Posts: 4174
(4/18/02 5:27:22 pm)
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Re: Bolt wt
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Thanks CP!
TFF VMBB Email Tac