Hi Jacob, you can download Chairgun Pro (free download) and carefully fill in your parameters, and it will visually show you the trajectory arc. You can plug in up to four different configuration on different tabs and switch back and forth.
I have a Webley Vulcan .177 and a Stoeger X50 .25. The Webley is much lower powered than the Stoeger. So this comes as a bit of a oddity. The Stoeger should be pushing lead at about 850fps, the Webley about 650fps.
If the gun is advertised at 900 fps with lead, that probably means 19.91 gr. generating 35 FPE.A 26.23 gr pellet would be doing 775 fps to yield a similar amount of energy.Huh, I just checked the X50 in .25 cal on PA, and it actually states: "Up to 900 fps w/alloy pellets."If that's accurate, you're talking 900 fps with 14.4 gr PBA's for 26 FPE.A 26.23 gr pellet would only be doing 675 fps to generate the same FPE.
I am not interested really in the FPE as 26 is way more than my Webley.
If this thing really is shooting lead at under 800fps then I am going to try and return it for something, maybe a 392. Because at that point trying to 0 a .25 is just worthless. The pellet will arch so bad trying to get to 30 yards that anything closer or farther will always be a miss. I guess we will see.
.25 springer's are a handful from what I have read very hold sensitive... I do not know that there are any 40 fpe springers...I wonder if you have done much reading up on air rifles. One of the things about springers is the more powerful the more likely it likes to eat scopes... double recoils...at the 40 fpe level well that is PCP territory...