Questions about RWS 34

[Checkpoint]

Hi Everybody!

I just received my RWS 34 like two days ago, and was able shoot with a bit yesterday as the weather cleared up. Out of the box it's pretty accurate, after I adjusted the elevation.

As it's a new rifle, I was reading that some of the diesel/oil needs to be burned off and that's why it sounds like a .22LR going off. I previously had a Crosman Fire NP, and did not enjoy the cocking effort, weight, or the fact that the rifle didn't have iron sights.

• Is it okay if the barrel is smoky after a shot?
• The gun is pretty loud, such that my backdoor neighbor heard it and thought I was shooting a larger caliber rifle. Will the noise die down after more shooting?

Thanks,

Supreet

[caseyk]

It sounds like it is Dieseling.  Did you clean the barrel yet?

[Roadworthy]

If it's that loud you should definitely clean the barrel.  I like to use Hoppe's Number Nine or Ballistol to remove factory deposits.  I follow with several dry patches as these solvents and their residues WILL detonate.  As a bonus the gun will shoot more accurately after cleaning.  If the rifle is too difficult to cock that is indicative of a too tight pivot screw.  You must remove the stock to loosen the pivot screw but pivot screws on recent production Diana 34 rifles have (in my experience) been far too tight.  It does not rely on this tension to stabilize the barrel.  Just be sure the screw is tight enough not to lose the nut.  Lube the cocking slot and put a bit of light oil on the cocking linkage pivot points.

[Bill_in_TR]

It is definitely dieseling IMHO. It would have been a good idea to pull some dry patches through it beforehand. The dieseling will eventually go away but it is not really good for the piston seal. Wiping the bore should get rid of it.

[Doug Wall]

Shooting heavier than normal pellets through it will help eliminate the dieseling until it settles down a bit. If it's a .177, shoot 10.5 gr, pellets, if it's a .22, shoot something around 18 grains.

[Yarddog]

Sounds more like detonation...ie, excess oil igniting in the compression chamber rather than the barrel. This usually goes away after a few shots.

My 34 was pretty dry from new. Its a bit louder than my other rifles,  but nowhere near the report of a powder burner. 

Its not unusual for any of my rifles to smoke a bit after a shot, even after many shots after a barrel cleaning. But they don't exhibit any other signs of dieselling,  and their report is normal. I agree with those who recommend a thorough barrel cleaning with solvent, the patches. In fact, i use JB bore paste then solvent in a new barrel. Most everybody has their own method that they are personally confident with.

[mtsheron70]

I always run a mop brush through a barrel, and even on a brand new gun for this reason.

[Checkpoint]

I will get to cleaning the rifle later today, need to get some patches, or I guess an old t-shirt will work. I called AOA, they said to just keep shooting.

[subscriber]

SUPREET,

What pellets are you shooting?  More precisely, what weight?  If they are .177 and less than 8 grain in weight, they may shoot at over the speed of sound when some "fresh out of the box" dieseling is occurring.

The cracking noise is what draws unwanted attention, and hurts one's ears.  To prevent breaking the sound barrier while the excess lube is burning off, shoot pellets on the heavy side.  Around 10 grain should work.  If 10 grain pellets are shooting at over 1150 FPS, there is something unusual going on.

Oil in the barrel is going to burn off within 5 shots (unless it is refreshed by excess lube in the compression cylinder).  By all means clean the barrel.  Dry patches should do. If you use a solvent, follow up with dry patches, as flammable solvent residue will diesel like nothing else for a shot or two.

[WolfyW]

All the above and define  stop shooting the really light pellets. Bought a Diana 350 recently and, although I do all the above, it took over 300 pellets before it stopped dieseling. What you are seeing happen may be beyond dieseling, it's loud because it's actually detonating. As mentioned above, stick with at least 8 grain pellets.

[Yogi]

My 340 N-tec still smokes a little after about 1,000 pellets through it.  It is not load however.

-Y

[Checkpoint]

SUPREET,

What pellets are you shooting?  More precisely, what weight?  If they are .177 and less than 8 grain in weight, they may shoot at over the speed of sound when some "fresh out of the box" dieseling is occurring.

The cracking noise is what draws unwanted attention, and hurts one's ears.  To prevent breaking the sound barrier while the excess lube is burning off, shoot pellets on the heavy side.  Around 10 grain should work.  If 10 grain pellets are shooting at over 1150 FPS, there is something unusual going on.

Oil in the barrel is going to burn off within 5 shots (unless it is refreshed by excess lube in the compression cylinder).  By all means clean the barrel.  Dry patches should do. If you use a solvent, follow up with dry patches, as flammable solvent residue will diesel like nothing else for a shot or two.

Hey!

I currently have some Crosman Premiers 7.4 grain, I ordered some JSB’s 8 grain.

[subscriber]

Hey!

I currently have some Crosman Premiers 7.4 grain, I ordered some JSB’s 8 grain.

That should help.  It may be on the edge though.  Adding one can of 10.5 grain Crosman pellets to your order would be smart, just in case.

[HectorMedina]

Supreet;

There are two components to the discharge sound of a gun:

a) Propellant (either high pressure air or combustion gases)
b) Projectile travel  sound

In the case of supersonic projectiles, the projectile itself breaks the sound barrier with the attendant "sonic boom".
A pellet does not have the size of an airplane, so the "boom" becomes a "crack".

The DIANA 34 is capable of up to 20 ft-lbs yield, so for some pellets that means going supersonic.

A supersonic pellet will also create enough friction in the barrel to evaporate some lube in the barrel without any need for the piston to be causing some combustion, so cleaning the barrel makes a lot of sense in new guns because factories (unless otherwise ordered by importer of record) lube the guns for preservation in storage.

Hopefully, when you clean the barrel and use heavier pellets you will find that the gun is not loud at all.

HTH




HM

[Checkpoint]

Supreet;

There are two components to the discharge sound of a gun:

a) Propellant (either high pressure air or combustion gases)
b) Projectile travel  sound

In the case of supersonic projectiles, the projectile itself breaks the sound barrier with the attendant "sonic boom".
A pellet does not have the size of an airplane, so the "boom" becomes a "crack".

The DIANA 34 is capable of up to 20 ft-lbs yield, so for some pellets that means going supersonic.

A supersonic pellet will also create enough friction in the barrel to evaporate some lube in the barrel without any need for the piston to be causing some combustion, so cleaning the barrel makes a lot of sense in new guns because factories (unless otherwise ordered by importer of record) lube the guns for preservation in storage.

Hopefully, when you clean the barrel and use heavier pellets you will find that the gun is not loud at all.

HTH




HM

Hi Hector thank you for the information. Yes, I will be adding heavier pellets, hopefully some H&N 10 grain ones or JSB 10 grain ones.

[Checkpoint]

Well happy to say the Lady and I are getting along a little better. She likes a gentle hand, and we got our first kill today. One-shot, one kill.

[HectorMedina]

 

[Checkpoint]

Supreet;

There are two components to the discharge sound of a gun:

a) Propellant (either high pressure air or combustion gases)
b) Projectile travel  sound

In the case of supersonic projectiles, the projectile itself breaks the sound barrier with the attendant "sonic boom".
A pellet does not have the size of an airplane, so the "boom" becomes a "crack".

The DIANA 34 is capable of up to 20 ft-lbs yield, so for some pellets that means going supersonic.

A supersonic pellet will also create enough friction in the barrel to evaporate some lube in the barrel without any need for the piston to be causing some combustion, so cleaning the barrel makes a lot of sense in new guns because factories (unless otherwise ordered by importer of record) lube the guns for preservation in storage.

Hopefully, when you clean the barrel and use heavier pellets you will find that the gun is not loud at all.

HTH




HM

Hi Hector thank you for the information. Yes, I will be adding heavier pellets, hopefully some H&N 10 grain ones or JSB 10 grain ones.

Hey Hector, so I got the JSB Hades 10 grain and I didn't get to shoot as many as I'd like, but I found that the JSB Exact 8.4 is what my Diana is comfortable with. Does the pellet change the way the gun shoots? Rhetorical, I think the I have to get used to the 10 grain because I missed twice with that, got three kills with 8.4.

I also did clean the barrel with patches wet and dry.

[Yogi]

I suggest that you look at Chairgun or another trajectory web site.  I use this one: http://www.airguns.net/trajectory.php

Even without a Crony put theoretical numbers into the program and then vary the pellet weight and Ballistic Coefficient.
You will then see how great the variation of the pellet flight is.
Otherwise just set out sheets of paper at various distances and see where the pellet lands with different weights.

-Y

[jason miller]

Changing pellets can certainly change impact location as well as accuracy potential, if that’s what you’re asking. Just like any rifle, it’s best to find what ammo shoots best, sight in for that, and stick with it.