Don't try to push those 40 gr.heads too fast. Limit to 3200 fps. They can have a nasty habit of disintegrating on the way down range if they are of the Super Explosive variety. Even regular constructed heads don't often like too be pushed too fast. They are usually great for .222 and .223 ammo. 22-250 has too much horsepower for them.
Posts: 239 | Location: North Smithfield, RI USA | Registered: 09 March 2002
Andrew - While it is true that some of the 40 gr bullets originally designed for lower velocity cartidges such as the .22 Hornet will disintegrate in flight when pushed to higher vlocities, the modern designs such as the Nosler Ballistic tip and Hornady V-max will hang together at any speed that can be reached in a 22-250. I believe that Nosler tested their Ballistic Tips to 4600 fps without problem. Can't say I know what they where using to reach those velocities and I'll bet barrel life would be pretty limited.
quote:Originally posted by Rust: Andrew - While it is true that some of the 40 gr bullets originally designed for lower velocity cartidges such as the .22 Hornet will disintegrate in flight when pushed to higher vlocities, the modern designs such as the Nosler Ballistic tip and Hornady V-max will hang together at any speed that can be reached in a 22-250. I believe that Nosler tested their Ballistic Tips to 4600 fps without problem. Can't say I know what they where using to reach those velocities and I'll bet barrel life would be pretty limited.
Rust, you are correct about those bullets. Take Hornady for example. Their "Varmit Express" ammo in 22-250 w/40gr. V-Max is 4150fps. The 220 Swift is 4200fps. One surely needs a bullet designed for these speeds. Gerard Schultz is getting 4400fps in a 220 Swift with his 40gr. HV's.
