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Old 11-10-2012, 08:30 PM   #1 (permalink)
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Boring out barrel back?

I am thinking about having the back of a two piece barrel bored for Freak inserts (specifically a Dye UL) but I am interested in how the ball will be affected by one and two steps in barrel ID.

My options, as I see it, are:

1. bore back that has same ID as front, thus having one step up from end of Freak to muzzle of barrel.

2. bore back that has smaller ID than front, thus having two steps up from end of Freak to muzzle of barrel (unless the Freak used has the same ID as the barrel back, which is unlikely).

Is one option going to be notably better than the other?
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Old 11-12-2012, 01:43 AM   #2 (permalink)
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Nothing?
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Old 11-12-2012, 01:49 AM   #3 (permalink)
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I have bored a few things, and built a few barrels from scratch. I do not seem to see any difference in one or multiple steps, save sound signature.

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Brass Freak compatible and Equation inserts in .665, .670, .675, .678, .680 and .685

Current Freak compatible inserts in stock:
.665 = 0, .670 = 16, .675 = 3, .678 = 4, .680 = 4, .682 = 4, .685 = 11

Still selling brass tubing, with .678 barrel stock now available!

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Old 11-13-2012, 09:24 PM   #4 (permalink)
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This is a theatrical opinion (as in I have not tested it) but I always recommend that you do not use an insert larger than the original back, or barrel bore (for one pieces). Any how when you bore a UL for inserts their is some of the original bore left in tact so essentially you have 2 steps. starting at the insert transition into the remaining original bore and then again into the tip bore. During these transitions I think you should always open up into a larger bore.
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Old 11-13-2012, 10:06 PM   #5 (permalink)
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Thanks. I agree with your advice.

However, if I find a back (one of the larger ones) that has the same ID as the tip, I will only have one step. Is this empirically better than two steps? Or does it not matter?
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Old 11-13-2012, 10:36 PM   #6 (permalink)
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In that case I don't think it would matter if everything matched up you would essentially have a single bore barrel. I dont think you will have that situation though. I don't know what all the other brands tips measure but I know SP tips measure 700 id for the tip your not going to find an insert that size (at least I have never seen one).
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Old 11-13-2012, 10:49 PM   #7 (permalink)
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Per previous post. No difference, save sound signature. Multiple steps are quieter, sometimes.

Ty
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Brass Monkey Customs

Brass Freak compatible and Equation inserts in .665, .670, .675, .678, .680 and .685

Current Freak compatible inserts in stock:
.665 = 0, .670 = 16, .675 = 3, .678 = 4, .680 = 4, .682 = 4, .685 = 11

Still selling brass tubing, with .678 barrel stock now available!

My feedback: MCB - eBay - AO
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Old 11-13-2012, 10:50 PM   #8 (permalink)
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Quote:
Originally Posted by idkfa View Post
Thanks. I agree with your advice.

However, if I find a back (one of the larger ones) that has the same ID as the tip, I will only have one step. Is this empirically better than two steps? Or does it not matter?
It would not matter until you shoot paint sizes close to the ID of the unbored back. In a perfect situation, the paint shouldn't touch the barrel after the insert. If you are trying to determine what size back to use, I'd get the biggest I could find. So it would allow for a wider range of inserts to be used.
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