Western Airguns Western Rattler .30 cal questions

Hi I am looking at the western Rattlerin 30 cal because of the FPE it has to try some heavy slugs , So my question is
1. magisine length ?? , how long of a slug can you use >??? so it cycles normal ,
2. what diameter is the .30 caliber barrel , is it .300 like a FX , evol eact or is it more like a firearm caliber like texan ,308 ?
3. any idea of twist rate ?

I see specs and it says 50- to 175fpe this is alot compared to my evol or my mk2 impact .
So this means the rattler has enough power to shoot a 80 grain 990 fps , this is alot of power ,
thanks
 
Some pertinent Info I recieved from another member regarding Rattler 30 slugs that you may find useful...


Western Rattler .30
Max slug length .787” .
Barrel 28" w/1-26” twist.
Factory reg set at 148bar.
AVS 65g FBHP .3013 dia .418” length
BC 0.144
995 fps 143.9 fpe
ES 4 fps
SD 1.47 fps
 
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