Tuning DAR .177

[wendell]

I've been enjoying my DAR but it's not without faults. Pellet clipping, loose wood stock, and cocking lever pin that kept coming loose. I've managed to stop the clipping pellets but this gun I feel has a barrel on the large bore size. The Crosman 10.5 pellets are like shooting a shotgun. The AA10.3 is so so. Now the JSB 8.44 4.53 gr are lights out at 25yards. I think I may need another barrel. From a 3000 fill, I shot the 10.3 an Av 887,es8, DV 2 and the Crosman 10.5, AV866, ES10, DV2. Any Ideas? I'm opened to advise

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[Vetmx]

Not many barrels shoot every pellet you try with great precision. That’s why we all try a bunch of pellets to find what our gun likes. Yours appears to like 8.44’s that are absolutely hauling ass. If you are dead set on using a 10gr pellet, you can try to increase or decrease your speed with them to see if things tighten up. You don’t need a new barrel. Maybe just a slightly different tune. 

 

[Odoyle]

Are you shooting the brown boxed 10.5gr Crosman Premiers? Odd that those would not group.

Try Daystate labeled JSBs Kaiser and Sovereign. They shoot noticibly better in some of my 177 guns compared to JSB and AA variants.

The 4.52 FX labeled 10.34gr JSBs may be worth trying too.

 

[crazyhorse]

Just curious what was the clipping problem ? My DAR.22 still clips end cap although not as much since tightening baffle retainer.

 

[nervoustrig]

I have the .22 and .25 and neither is pellet picky but I have no experience with the .177.

However I wanted to point out I've generally found the 10.5gr Crosmans to tilt toward the large side of things. Do you have a sufficiently accurate caliper or micrometer to measure a sampling of 10 of them and the JSB 8.4gr that are marked 4.53mm? That would give some good insight as to whether the barrel does indeed prefer larger heads.

 

[LFCM]

Try enlarging the muzzle cap hole to .270" in a drill pres ( for straightness). I did and clipping is a thing of the past

 

[wendell]

Vetmx, I will try a different tune with the 10.3's and see what happens. I have tried so many different pellets it's not fun anymore. Thanks!

 

[wendell]

LFCM I have my shroud cap at 6.59mm that's an opening for a .25 pellet. No more signs of marking anymore. 

 

[Vetmx]

Vetmx, I will try a different tune with the 10.3's and see what happens. I have tried so many different pellets it's not fun anymore. Thanks!

We have all been there. You’re not alone.

 

[wendell]

Nervoustrig I did some head size measures on some 8.4, 4.50,4.45,4.41,4.47,4.46,4.48,4.45,4.45,4.48,4.41,4.47&4.43. The Cros 10.5- 4.46,4.39,4.46,4.47,4.54,4.52,4.48,4.49,4.50,4.30,4.51&4.45. 

 

[wendell]

Odoyle I will try to some more different pellets. I'm on backorder now, waiting! I wish there were more head sizes in the 4.53 .177 pellets.

 

[scotton]

I recently purchased some H&N FTTs that were marked 4.52 and actually measure 4.53. Most JSB and AA pellets measure a hundredth smaller than they are marked (so 4.52 measure 4.51 on the pellet gauge). The FTTs are the only pellets I've seen that measure larger than marked.

 

[wendell]

Scotton, I will try those. I think I have some on hand. Thanks!

 

[wendell]

I received my shroud adapter for my DAR today from Stefan. He does great workmanship and the adapter fits well. I put the Tatsu on and shot twelve shots at my target twenty-five yards with a slight breeze

, twenty-nine degrees. I'm going to put the DAR away and work on my next project.