I currently have a gen 1 Texan 45. I want a Texan SS with the Carbon bottle. medium game. is the 357 the best all around Texan for power and accuracy?
Your FPE is going to suffer a bit from the short barrel but not much until you start shooting the heavier slugs.
That being said I get better accuracy with the 308 than 357 I think it might have something to do with the cg of the bullets, in my limited experience the 357 heavies seem to have a hard time getting good groups where as the 308 doesn't seem to be an issue that being said it was still within kill zone groups at 75 yards
I was not shooting off the carbon bottle and it was an older version of the 357
When you say medium game, could you be more specific?
I have Texans in several calibers, .257, .357, .457 and used to have .308 but got rid of it because it was bullet finicky.
One thing I did was rent a rifling lead reamer and make my chambers deeper for the midweight or heavier bullets. I found the factory AirForce chambers are MOST of the problem with the Texans. The chambers are simply too short and if too much of the bullet hangs out in the loading tray accuracy is lost. Note that I got rid of the .308 before I discovered the short chamber issue - reaming it deeper might have fixed it too.
I've found that the .257 with a 85gr NSA BTHP is very accurate and I would comfortable use it on game weighing up to 100 pounds. It shoots 1000 FPS n around 190 FPE and is a tack driver. I also use the NOE cast 72gr and it also is excellent http://noebulletmolds.com/NV/index.php?cPath=26_603
For .357 I have found the Texan likes the NSA 130gr or a lot of people's favorite the 142gr BTHP. These shot well in my .357 Texan prior to the chamber mod and still shoot well. A friend used this bullet to take a nice 100 lb spike day before yesterday at 50 yards with a lung/heart shot.
But what really shines are either of these two cast bullets in the .357.
http://noebulletmolds.com/NV/index.php?cPath=35_578
http://noebulletmolds.com/NV/index.php?cPath=35_590
Both these bullets have delivered smashing performance on 40 pound and up through 200 pound and have been used to take coyote, hogs and deer.
I would note that all my rifles came with the aluminum bottle and long before AF came out with theirs I had bought changed to carbon fiber bottles. So I can shoot at higher pressures if I want but it also requires a hammer spring change. Dyotat100 sells a much better spring than anyone else. The African spring caused me problems and I had to pull them out.
My .457 Texan was reworked by Doug / Dyotat100 and he is the guy that did all the development that AirForce copied in their new system. I will say that it's a monster of an air rifle and loves bullets in the 250 to 300 gr range and I get over 600 FPE but also with accuracy... I have found that if I push up the power above that the accuracy falls off a bit.... But 600 FPE where I can put 4 shots into 1-1/4 at 100 yards is satisfactory for hunting for me.
Note Doug is shooting a 50 cal Texan he built and getting 1 MOA at 200 and 300 yards!
So back again to 'medium game', just what did you have in mind?
Think about this. Do you want to trail a big wounded hog in the brush at night? Use a .45
And then again a wild hog/bore is just that, wild!
Then time to die is of little to no consequence?
Just like rats?
Not that i oppose to varmint hunting at all! Not by far! Keep the pigs down anyway you can!
It's just that when the switch from powder burners to airguns arrive then somehow "standards" waters way down.
When 357MAG levels are in play with powderburners then something like 25ACP-32ACP is suddenly quite acceptable in airgun power.
Does ehtical hunting gets nulled when an airgun is the veapon?