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Old 08-14-2012, 02:57 PM   #521 (permalink)
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We couldn't find any information on standard hole spacing.

This is why we ended up with 1" spacing.

Has anybody found a good fitting rail?
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Old 08-14-2012, 02:59 PM   #522 (permalink)
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I am using a 5" inch rail made by Mako Industries that can be nounted in a couple orientations depending on which way you want the angle to go, up or down. It works well with the FSR riser or standard optics mounts with no riser.
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Old 08-14-2012, 03:01 PM   #523 (permalink)
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Bill those look exactly like the ones we have on our SR1's. Are yours completely level or are they angled to one end?
They are angled. maybe 5*

I posted up a pic of a rail that I made with a 15* angle. It looks pretty stupid but it was getting us on target at 65 yards

I pulled it off and went back to iron sights
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Old 08-14-2012, 03:17 PM   #524 (permalink)
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Originally Posted by CCMachinist View Post
They are angled. maybe 5*

I posted up a pic of a rail that I made with a 15* angle. It looks pretty stupid but it was getting us on target at 65 yards

I pulled it off and went back to iron sights
So what if you just angle the top of the marker slightly?
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Old 08-14-2012, 03:47 PM   #525 (permalink)
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This is what I did.

It actually works. This allows more crosshair adjustment . Typical rifle scopes run out of adjustment on the horizontal. The vertical is fine because its just left and right.

Just a note we kept running out of adjustment on the 5* rail

I haven't put a lot of effort into sighting systems because of the variations. We are doing more of a function test. I have done a few accuracy test but they were with iron sights.


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Whatever your hand finds to do, do it with your might; for there is no work, nor device, nor knowledge, nor wisdom, in the grave, where you go.

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DOOR GUNNER handgun mounts for gunsafes.

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Old 08-14-2012, 03:50 PM   #526 (permalink)
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I have done most of my shooting with 12 gram and paint just to make sure the gun works. The set up has been very reliable and really consistant for 12grams. The FS is much better than the paint within about 7fps

But if you want really close consistancy, hpa remote has been the best.
each time we tried it over the chrono its been within 3fps. Trinity can chime in here. We did this on saturday.
I have been watching the discussion over 12 grams for awhile now and Bill and I talked a lot about them this past weekend. I have a lot of experience using them with first strikes. In fact, for the past two years that's all I used with first strikes in the T8, T9, and T9.1. There are a couple of reasons for that. First, I desperately wanted to be done with remote lines, whip lines, and refilling HPA tanks so I jumped at the chance to use 12 grams.

Second, the T8 and T9 were my entry point into using first strikes and the T9 didn't have an easy, convenient way of using a remote line. Using 12 grams meant that every mag in my vest was interchangeable with both guns. When the T9.1 came onto the scene, I simply continued doing what I was doing. Continued, that is, until the Tiberius/Lapco .683, rifled barrel came along.

The new small-bore barrel required a major increase in the reg pressure to force a first strike down the barrel. Using 12 grams, I began to see some wild swings in the velocity of the T9.1 In my experience, swings in velocity clearly impact vertical accuracy and I was seeing the results of those swings on the field in the form of misses that should have been hits. Misses that were dead-center accurate but impacting higher or lower than they should have been for the range I was shooting. I started checking the gun against the chrono more carefully. I found that 10-15 FPS swings were pretty common using 12 grams with the small bore barrel. In large part, that was probably because the Tiberius regulator was probably outside of its optimum pressure level, but the 12 grams were also a contributing factor.

Guys like uv_halo on this forum and Chicago on the Tiberius forum were doing some parallel testing that seemed to verify my own work. The remedy to the swings was to double reg using an HPA tank. Using a 3000 CI Ninja reg set at about 400 PSI, my swings in velocity dropped to 5-7 FPS (so about a 50% improvement). It got even better when I dumped the small bore barrel and went to the .688 rifled Hammerhead barrel.

Similarly, I have shot both HPA and 12 grams through two different SR1s. I have nothing that I would characterize as definitive test, however, I have put about a dozen rounds over the chrono with both prototypes using both HPA and 12 grams. I believe that there is a definite consistency difference between using 12 grams and HPA with a second reg.

My initial impression is that the SR1 is more consistent out of the box. With 12 grams and first strikes is about as consistent as the Tiberius gun is when it is shooting first strikes and using the appropriate HPA tank - maybe about 7 FPS on average.

The SR1, shooting first strikes, using HPA has velocity swings of only about 2-3 FPS. In fact, two weeks ago when I first started using HPA I thought my chrono was broken because for the first three shots with the SR1 using HPA, the FPS was exactly the same. Then it varied by 1 or 2 FPS with one swing of 3 FPS.

I am calling this up from memory but I think uv_halo posted a ballistic graph for first strikes dealing with the vertical drop between first strike rounds travelling at different velocities. As I remember, that chart reflected that at 25 yards the difference between two first strikes travelling at 5 FPS difference was about 1 1/2" and 3" with a 10 FPS difference.

The ultimate question for anyone using either Tiberius rifles or the SR1 is whether the difference in vertical accuracy is important enough to you to go through the bother of using a remote line with HPA. Remember though, that the ballistic chart I mentioned above was measuring the differences at just 25 yards.

Last edited by Trinity; 08-14-2012 at 04:42 PM.
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Old 08-14-2012, 03:53 PM   #527 (permalink)
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What if you did this with weaver rail?


Last edited by doc Zox; 09-03-2012 at 10:44 PM.
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Old 08-14-2012, 03:55 PM   #528 (permalink)
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I think that for most people if your hand loading one round at a time you should be willing to sacrifice everything for optimum accuracy
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Old 08-14-2012, 05:01 PM   #529 (permalink)
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[QUOTE=doc Zox;2443772]What if you did this with weaver rail?


I think shotgun ghost ring sights would have the best chance of working .

Think of your target a little larger.

The FS isn't an aim small miss small bullet.

not yet anyway.

ghost rings sights - Google Search
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Ecc. 9-10
Whatever your hand finds to do, do it with your might; for there is no work, nor device, nor knowledge, nor wisdom, in the grave, where you go.

NEW STORE http://store.chipleymachine.com/

DOOR GUNNER handgun mounts for gunsafes.

http://www.machineshopdpm.com/
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Old 08-14-2012, 07:06 PM   #530 (permalink)
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Originally Posted by CCMachinist View Post
I think shotgun ghost ring sights would have the best chance of working .

Think of your target a little larger.

The FS isn't an aim small miss small bullet.

not yet anyway.

ghost rings sights - Google Search
Like these muzzle loading ones?

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