Recoil System P30 / USP Full size

[HK1]

I have posted this question elsewhere, but I would like to know the opinions from the people in this excellent Board.

Does anyone knows the reason for the changing of the recoil system in the P30 and why it was not used the recoil system of the USP full size?

I understand that the recoil system was changed for the compact models due to the size of the slide and barrel but this is not the case of the P30 as it is not a small gun.

Which of the two recoil systems (USP full size vs. P30) is more effective or better at reducing recoil?

Thank you in advance for sharing your views and opinions.

HK1

[MaD HuNGaRIaN]

My guess? Cost. The new one is cheaper to make, and looks that way too.

[harrydog]

I'm sure that the polymer buffer is cheaper than the dual springs. That, coupled with the fact that there is most likely no significant difference in long term durability between the two systems based on H&K's own testing and the track record of the USP Compacts, and it becomes a clear choice. Plus, the polymer buffer actually makes follow up shots quicker in my opinion.
If you're concerned about it, you shouldn't be. None of the other polymer framed guns have any recoil buffers at all and those frames don't seem to have any durability problems.

[HK1]

Thank you for your comments, but I am still wondering about the issue of the recoil system.
I have a P30 and I am very happy with it, but would like to know if the system included in the P30 is more effective at reducing recoil or it was a case were any real difference in effectiveness was so marginal that it wasn`t worth the cost as it seems to me that the system found in the USP full size looks to be more complicated and expensive to produce, at least in my non-expert opinion.
Sorry folks, but is just one of those cases were someone (me) have an stupid question which would like to know the answer just for the sake of knowing it and get the issue out of its head.
Please, if anyone has an opinion about this, I would appreciate it.
Thank you in advance,
HK1

[HKCHEF]

I am pretty sure the HK45 and P30 has the "Chanical Recoil System" but, some of the other members will have to elaborate on how it works. ;)

[bspring]

I'm not sure what the recoil spring is for a compact, but I like increasing the recoil springs in my USP by 2lbs, 14lbs for the 9/40 and 16lbs for the .45.

Bill

[Scooter]

I am pretty sure the HK45 and P30 has the "Chanical Recoil System" but, some of the other members will have to elaborate on how it works. ;)

The Chanical Recoil System was a hilarious thread.

Neither system can reduce actual recoil. They only affect the felt recoil. The second spring doesn't come into play until the last 1/8" of the slide travel. The plastic buffer is much cheaper to make than the dual spring setup.

In the competition world, dual recoil spring made a comeback but pretty much has become a dead fad. Most people have gone back to using a conventional recoil spring with some shock buffs instead of the dual spring setups. Most people didn't like how the gun tracked with the two different spring rates. The shock buffs are in there mainly to reduce battering of the frame because we tend to run lighter than usual springs. 10-13 lbs springs on a 1911 is on the very light side when shooting a 40 or 45.

[Sobriquet]

I am pretty sure the HK45 and P30 has the "Chanical Recoil System" but, some of the other members will have to elaborate on how it works. ;)

I dropped a reference to that last week and no one even noticed. LOL.

I'm pretty sure these guys know how it works. Let me know if you want their email addy:

http://i279.photobucket.com/albums/kk131/Sobriquet47/CRRS.jpg

[HKCHEF]

I still think "Chanical" is a old wooden ship.

[harrydog]

I dropped a reference to that last week and no one even noticed. LOL.



Or maybe they just didn't comment.

[HK1]

Thank you all of you.

HK1

[orfeo]

The dual spring recoil system in the full size USP is nice but it also causes torquing of the pistol in the hand. It definitely does protect the gun from the hottest loads, and could probably take more abuse than the system in the compacts, however: the single-spring recoil system will get you back on target for the follow-up shots faster and cleaner than the dual-spring system will, since the dual spring setup is alot more "flippy". The nylon buffer in the compact is also cheap and easy to replace.

If I remember correctly (feel free to correct me if anyone remembers it differently), Bruce Gray ran his fullsize USP without the second recoil spring in the gun.

[swiss_seth]

I am never going to escape that magnificent aspect of German engineering.

You know its a good design when they come up with the name themselves. Was there a registered trademark "T" next to chanical in that advertisment for the HK 45

cest le vie

P. S. I knew before opening this thread there was going to be a chanical reference...