.17 Winchester Super Magnum
Mar
13
The .17 Winchester Super Magnum is a bigger, meaner .17 rimfire created for varmint shooters who like the low price and recoil-free performance of smaller .17s but find them lacking in range, wind-bucking ability, and wallop. This round is based on a necked-down .27 nailgun (!) case and holds lots of powder, which propels either of two different 20-grain bullets at an honest 3000 fps, and a 25-grainer at 2600 fps. It is, I have on the highest authority, an honest 300-yard cartridge. As it presently stands, a box of 50 will go for $15.
Manufacturer: Winchester
Price: $15.00
I really like this round, but I don’t like the fact that the 25gr loses 400 fps. Just going off 17HMR numbers it should be well over 2600fps, yet the 17WSM has a much larger case, thus more powder capacity. I could see a bullet close to/at 30gr losing a lot of FPS per gr, but this? What B.C. do both bullets have? I’m just trying to figure out at what point the 25gr starts doing better than the 20gr.