I indexed my barrel at 6 o'clock.
It's always better to keep the scope as optically centered as possible. So I use Sportsmatch fully adjustable mounts and keep the scope optically centered.
I use turrets only for fine tuning of my zeroing.
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RAW REPORT
- Thread starter Hynzie
- Start date
I indexed my barrel at 6 o'clock.
It's always better to keep the scope as optically centered as possible. So I use Sportsmatch fully adjustable mounts and keep the scope optically centered.
I use turrets only for fine tuning of my zeroing.
Bored today... so wrapped my air reservoir on the TM-1000 w/ C.F. Wrap, think it’s a pretty good match?
That looks great. I'd like to do the same to my TM with the white tube. If you don't mind sharing, what exactly did you use(never used CF wrap before).
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I haven't checked my velocity yet shooting the 13.4's. I should probably do that pretty soon...
My Hammer spring screw appears to be almost all the way backed out currently. The gun was just gone through by Martin, so I'm assuming the velocity is set correctly (I asked him to set it up for the 13 grain pellets).
Sean
My Hammer spring screw appears to be almost all the way backed out currently. The gun was just gone through by Martin, so I'm assuming the velocity is set correctly (I asked him to set it up for the 13 grain pellets).
Sean
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My comment was on the actual SHOT group and not the index circle.
As to my TM, when it was set up as a .177 it was also using a MUCH lighter hammer & sprung heavier. The lock time much faster than stock along with the cyclic vibration being far less. Together certainly helps in shooting smaller group sizes when the barrel & pellets play well together. In my case was @ 790-800 fps out of 16" of barrel.
Less barrel length does not have the harmonics and wiggle longer barrels have which also aids in accuracy.
SOOOO many little things .....
As to my TM, when it was set up as a .177 it was also using a MUCH lighter hammer & sprung heavier. The lock time much faster than stock along with the cyclic vibration being far less. Together certainly helps in shooting smaller group sizes when the barrel & pellets play well together. In my case was @ 790-800 fps out of 16" of barrel.
Less barrel length does not have the harmonics and wiggle longer barrels have which also aids in accuracy.
SOOOO many little things .....
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Totally agree. When it works, it works, leave it alone. My old TM1000 with the gorgeous walnut deep belly stock, serial number 0031 would easily shoot better than dime sized groups at 50 yards. The group posted below is a ten shot group, JSB 10.3 grain at 900 FPS. If I'd have stopped at 5 shots it would have been well inside 1/4 inch.
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Well, I just finished collecting BC data at -15F for my .25 cal. Fingers too frozen to type now. iPad battery went from 97% to shutting off in less than 20 minutes!
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Has anyone polished the poly barrel with JB? I'm just wondering how it works on the poly barrel. My reason for considering is it seems to lead up pretty fast. It shoots way better clean.
Crusher
Crusher
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I haven’t tried it yet, but perhaps I meed to clean this barrel since I have jo idea how dirty it is and I have put nearly 400 rounds of my own down the pipe already.
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So I think I found out a few things:
1) My barrel was extremely dirty!
2) JSB 10.4 grains seem to shoot better in my barrel: (but still not 'great')
3) Crosman Premiers 10.5 gr rock-even when highly oxidized (from 1998): {unsorted, unweighed, 20 years old, oxidized heavily...}
5 shots, 0.040" CTC!
Followed immediately by 5 shots @ 0.030" CTC!
Needless to say I immediately went and ordered 4 more boxes of CP heavies!
Sean
1) My barrel was extremely dirty!
2) JSB 10.4 grains seem to shoot better in my barrel: (but still not 'great')
3) Crosman Premiers 10.5 gr rock-even when highly oxidized (from 1998): {unsorted, unweighed, 20 years old, oxidized heavily...}
5 shots, 0.040" CTC!
Followed immediately by 5 shots @ 0.030" CTC!
Needless to say I immediately went and ordered 4 more boxes of CP heavies!
Sean
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Interesting because my polygon barrel doesn't seem to like the 13.4 grain JSB's much at all. Now that I've cleaned the barrel, the 10.4 grains seemed to shoot pretty good. Obviously the CP's shot excellent, as shown above.
I'm wondering about trying different barrels since its now pretty easy to do (with a thimble on my gun)...
Sean
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Not a fan of thimbles on "Single shot" Target guns .... With the freebore ( loose leade ) a thimble has you loose the feel of how a pellet fits the bore when loading.
And the case of RAW you loose 1/3 of the barrels rigidity within the receiver too.
I simply will fit a barrel to receiver and using a dial indicator spin barrel within receiver finding where the run out clocks at 12:00, mark the spot and finish the transfer port and grub screw flats etc ... Done with the full rigidity of receiver front to back.
Scott S
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