Author Topic: JP Howitzer Brake (Read 1638 times)

rickyp · « **on:** March 27, 2004, 03:11:54 PM »

has anyone used one of these brakes?
how do the affect the barrel harmonics if at all?
how effective are they

gunnut69 · « **Reply #1 on:** March 27, 2004, 04:18:21 PM »

Sorry but I'm not familiar with any such brake but brakes as a whole do have an effect on barrel harmonics. Thats how the BOSS system works. It allows adjustment of the barrel harmonic via a threaded section that afjusts the length of the brake and it's weight distribution..

GWN · « **Reply #2 on:** March 31, 2004, 01:38:09 PM »

rickyp,
I installed one on a 300 Wby. Mag for a customer, and then test fired it both with brake on and off. My sensation with brake on was that I had just fired a 243. Also the noise and muzzle blast from the shooters perspective was not nearly as bad as I have experienced firing other braked rifles. It was the ugliest brake I've ever seen on a hunting rifle, though.
George

rickyp · « **Reply #3 on:** March 31, 2004, 02:24:22 PM »

but it works well right?

GWN · « **Reply #4 on:** April 01, 2004, 02:24:46 PM »

Yes, it works. A 300 Weatherby Mag with JP brake felt like a 243 Win.
George

rickyp · « **Reply #5 on:** April 01, 2004, 03:25:57 PM »

I guess it would make a rem 700 in 308 or 30-06 feel like a 22 mag

gunnut69 · « **Reply #6 on:** April 01, 2004, 06:05:05 PM »

That's not a realistic assumption. The effectiveness of a brake is directly related to the volume of gas produced and the muzzle pressure of those gases. Simce most modern centerfires produce in the neighborhood of 50-60 K pounds of chamber pressure the real determining factor of the brakes effectiveness is the volume of gas. The bigger the case, the greater the powder charge the better a brake likes it.

doghouse95 · « **Reply #7 on:** April 01, 2004, 07:35:37 PM »

I like the VAIS brake. Great recoil reduction, and doesn't rip your ears off when you shoot it.
I've used several different kinds of muzzle brakes. There is a lot of difference from one to the next. I've found the VAIS to be the best of the bunch, and cheaper than a lot of them.

GWN · « **Reply #8 on:** April 02, 2004, 02:26:45 PM »

I've only installed 1 Vias brake, on a 300 RUM. I didn't get the chance to test this one. I've installed 3 KDF brakes. One on a 270 Win, which was very effective in reducing recoil. Another on a Remington Model 7 in 243 Win; this one felt like a 22 LR but the muzzle blast was really bad. Both of the above KDF's were same diameter as barrel. I did install a large KDF on a 458 Win Mag and really could not tell any difference in recoil, brake on or off. If there was any reduction in recoil, it was not much.
George