Go to this site and download the ballistics calculator. I find it to be extremely accurate. Good luck! http://www.winchester.com/learning-center/Pages/Ballistics-Calculator.aspx
Winchester lists the ballistics of the ammunition it sells.
http://www.sportsmansguide.com/resource/ballistics.asp just click on your load
The Old West Scrounger usually has some.
It is harder to find anything from Winchester because they went out of business.
Here you go http://www.shootingtimes.com/ballistics/243_winchester.html
You will need to check with a large gunshop, or with an on-line ammo supply company. It IS available- but you will not find it at WalMart. The price of .348 Winchester ammo may be a shock to you- it is about $4-$5 per cartridge.
Google the ammuntion and you will get over 10 pages of possibilites.
yes, cheaperthandirt.com
No
winchester
Winchester Short Magnum
Pretty close to the same in ballistics. The 9mm is used much more commonly.