Theoben slug gun

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woogie_man

woogie_man

Member
May 3, 2021
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North Dakota, United States
Has there been anyone that has one of these rifles that have been set up for higher power to shoot slugs?



Have been wanting to find one of the Theobens for quite some time and know they are hard to come by, but figured if I am dreaming why not go all out. If I am going to get a high powered gun, might as well have it look good as well :D

I know awhile ago Chip Smith was making his custom receivers and what not, but those are about as rare as the actual theoben itself. So that got me to thinking if this is even possible or not.



So what say you guys?
 
Finding them is easy plenty of them here: https://www.guntrader.uk/Guns-For-Sale/results/21a6-3cce-baa8-15f4 the hard part if getting them to the US. All of these were made LONG before slugs were even an idea so who really knows how well they would do. The person to ask is you want to pursue this is Dave Slave here: http://airgunwerks.com he's the guy that would know. The spring (gas ram) guns were and still are the best ever mode. Their PCP's WERE ahead of their time at the time and while still a quality gun the PCP world has caught up to over ever surpassed them in some areas.

If you're interested in Theobens I suggest you join the Facebook group there LOTS of very knowledgeable folks there about theses guns.
 
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The question is is it worth all the trouble to do this? My thoughts are probably not. I own a .20 Crusader and thing it's great and their gas ram guns are still better than anything made today but trying to turn one of the PCP's into something else seems like a lot of work. If you want to do this there are better platforms to start with. 
 
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Yes it can (and has) been done but there is a whole load of engineering that needs doing to achieve the airflow to get a slug up to speed.

Regs, the plenum on a Theoben is not big so unless you fit an extension to the valve chamber then you will not get the volume required to push a slug with a reg, even then it would require a short core reg and gain minimal power. 


Fast flow would give more power but reduced shot count while a “free flow” will give more power still but a power curve like a rainbow.

The internal porting of the block needs opening, new high flow valve, reduced hammer pip length, heavier spring guide and a hammer spring from the suspension of a pickup truck to attain the speed to hammer needs to bash open the valve. Cocking effort and mechanical noise are horrible.


It simply not worth the time, effort and expensive.



Bb
 
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I was shooting H&N 25 Slugs out of my RAW today eggs at 150
Click to expand...

Yes, there are a few differences between the RAW and the Rapid that allow more power. These are, bigger plenum, improved valve and lastly the cocking lever give better leverage to enable it to pull back the hammer against the heavy springs required for higher power.



Bb
 
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Well there was an awesome member here on the forum that contacted me about having a 25 rapid mk2 he doesn't shoot any more. Well after some talking he agreed to sell me the rifle and can't wait to get her! Being a .25 rapid MK2 is great, but finding out that it has been through Allen Z makes it even better! So now I will be able to play with some pellets and have a hammer of a rifle for pest work.

Was really hesitant about starting this thread... but am glad I did now!
 
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