Short barrel .30 or .25???

This thread has become a 2 for 1 kinda thing. Anyhow Steve from aec channel kinda pointed at this once but with the .30 hatsan break barrel vs a .22 both shoot same FTLBs but the .30 was more destructive in ballistics gel. Cost aside, Personally I’d go .30 over the .25 in killing power larger diameter = wider area of critter smacking potential. My chicken coupe is 60yds from my house and the .25 has not had a problem taking out the trash pandas. The 30 does it better. My dream line compact is anemic compared to my Leshyis and r5 in its stock forum. I know FX rifles can be modded but ask your self i the cost to get it to the power you want worth it and is it the gun you truly like.
 
That's why I started this topic

If Dreamline is not powerful enough to push .30 slugs through the short barrel with enough power

Maybe I should order .25 

I have full-size bullpups in .30 and .25 I'm looking for something compact, I can drop in backpack, take on a bike ride, or even have in my car. 

My friends often ask me to stop by and take care of pests near their houses, I'm in Massachusetts - walking with full-size rifle case can cause unnecessary attention

People are not gun-friendly in this state


 
SCOUTY

I JUST MEASURED MY standard .25 IMPACT with "fixed" shroud OVERALL IS 30" with shroud collapsed, IT HAS A 600MM BARREL. AND I haven't found the correct data for the Impact Compact anywhere yet, Fx does not have it on their site. I was checking Utah airguns early this morning. the data you are referring to is for a .22 impact with the shroud extended.( fixed shroud means you cannot remove it without tools but it will extend and retract. Overall length is with extended shroud. In the specs. Utah airguns gives they state .22 and .25 side shot magazines both have a capacity of 28 pellets. I bought a side shot magazine from them and it's 26 pellets in .25 not 28. I don't know where that error came from perhaps FX. They give 29" for the standard Mk II .25 Impact with 600mm. So 600mm - 500mm = 100mm (just under 4" ) and 29" - 4" is about 25". The distance from the face of the barrel breech to the most distant rubber tip of the butt pad on my Impact is 4" plus or minus a millimeter. Add 500mm (19.685 inches) = 23.685" then add to that what ever they have on they end of the barrel in the picture About 2" or less ( the barrel may screw into it). that makes 25.685" for the compact Impact I think that piece on the end of the barrel is a cuff to redirect the spent air pushing the pellet. Try it another way: 4" from the back of the barrel breech to the end of the butt pad plus the 600mm barrel (23.622") + 27.622" for a standard Impact. If you doubt all this measure it out yourself on a standard impact. You are casting doubt on Fredrik, Jon and myself. I waited a few days to respond. If you listen to Jon on the you tube video he states 300 cc bottle, 500mm barrel, high capacity side shot magazine, with the 300 cc bottle I think it weighs 6lbs or less.