Actual bore size of Western Airguns Rattler .30?

[Badgerfarm]

I recently bought a Western Airguns Rattler from AOA and curious about the actual bore size of the TJ barrel. I asked a couple of the guys there and really didn't get a concrete answer. So far the only specific information that I have found is that it is a 1 in 26 twist. Does anyone have a Rattler in .30 cal that has slugged their bore for the actual dimensions? If not, I'll do it when I take the barrel off for cleaning before range testing. It would be nice to get ahead of the game so I can order some molds to cast my own slugs which I do for all of the rest of my big bores. With the weather so cold and crappy here I was hoping to have my molds and sizing dies ready before the first range day. What say ye fellow Rattler owners?
Thanks
Randall

 

[dmacrae]

 

[Badgerfarm]

Thank you for the chart. I went to the TJ site and did some browsing late last night but didn;t run across the list.
It is very helpful and good to know that I could step up to a .308 bore and a tighter twist rate.

 

[mackeral5]

I have had a couple .300 1:26 twist TJ's manufactured a couple years old, that generation seems to be a bit on the tight side and likes slugs sized to .298.

 

[Badgerfarm]

Good information to have. That will give me a place to start with some molds and sizing before nicer weather gets here.

 

[Castin’Catchin’ 26]

Good information to have. That will give me a place to start with some molds and sizing before nicer weather gets here.

I’m thinking about making this purchase. Let us know your shot string and results with slugs!

 

[Badgerfarm]

Will do. I'm trying to zero in on some promising profiles and slug weights for casting my own.

 

[TRIPP]

View attachment 330673

GREAT INFO ACCORDING TO ABOVE THEN, THE WESTERNAIR ARMS IN ,357 HAS A .350 LAND DIAMETER, AND A .357 GROOVE DIAMETER. THATS A PRETTY DEEP GROOVE .007 INCH. .356 MAY WORK EVEN BETTER THAN .357, LITTLE LESS FRICTION PERHAPS?

 

[Hornclayton]

Thank you for the chart. I went to the TJ site and did some browsing late last night but didn;t run across the list.
It is very helpful and good to know that I could step up to a .308 bore and a tighter twist rate.

I dont think you can step to a .308 because the mag diameter is .301

 

[dmacrae]

Here is a newer list that adds the .58.

 

[Badgerfarm]

Hornclayton you have a good point. I hadn't taken into account the diameter of the mag holes at .301.