Barra Airguns | 250z PCP Pellet Air Rifle FAQ

Troubleshoot my 250z

PCP (Pre-Charged Pneumatic) Pellet Air Rifle

Watch this video to learn general maintenance and operation of the 250z

Watch this video to learn adjustment and tuning information for the 250z

My 250z isn’t filling, what should I do?

Make sure your degassing screw is screwed in.
Make sure the fill probe is being inserted until it comes to a stop.
Cock the rifle prior to filling
If using a hand pump, apply rapid strokes of the pump for the first 10-20 strokes, then pump with the normal pace.
If none of the above work, then contact customer service for further assistance.

I’m having accuracy issues with my 250z, what should I do?

Clean the barrel using Ballistol, then follow up with dry patches.
Remove any aftermarket sound suppression devices and shoot. If that improves your accuracy, you either have a defective sound suppression device or you need to step up a caliber to prevent clipping.
Use quality ammunition. If it was cheap, and locally available, it most likely isn’t quality ammunition.
Use heavier ammunition or tune your rifle down. Faster isn’t always better. If you are using light ammo, reduce your regulator pressure, and back your hammer spring adjuster to flush with the back of the action. If you are already using heavier ammunition and are struggling with accuracy, you may need to turn things up. Excessively long / heavy ammunition may not stabilize properly within the design parameters of this gun, so if you are using slugs that are very long / heavy, you will need to change ammunition. Don’t be afraid to try out an assortment of ammunition, in brands, styles, head sizes, etc to find what works best.

How do I diagnose a leak?

If your gun is leaking while under warranty, be sure to reach out to customer service for a replacement.
Make sure you have a leak in the first place. Compressing air makes it warm. As the air inside your gun cools, the pressure will drop slightly, then as temperature stabilizes, it should level off and remain stable. This will manifest itself in a small drop of pressure and is perfectly normal (Ideal gas law). If pressure continues to drop, you probably have a leak.
Determine where the leak is coming from. Dipping the male suppressor threads (do not go deeper than half of the threads) into a container of water will reveal an issue with the valve if air is seen in the form of bubbles. The same can be done with the fill probe to diagnose leaks from the fill port. Again, only go deep enough so any air leaks have to bubble through the water. Remove the stock and spray soapy water around the pressure gauges and regulator. Look for bubbles to form and pop to signal leaks in that area.
O-rings, valves, and other components that are needed to fix any leaking issues are available on our website to fix guns that are out of warranty. All such work should be performed by a competent airgunsmith. Providing the identified source of the leak can help customer service guide you to the correct parts.

I’ve already invested in picatinny accessories like bipods, but the rifle only provides MLok. Do I really have to buy new accessories?

No, you can purchase inexpensive picatinny rails that attach to MLok slots that will allow you to use your existing picatinny accessories
When you do decide to purchase new accessories, consider moving to MLok.

How do I tune my 250z?

Make sure you have a chronograph so you can know how fast your rifle is shooting with the ammunition you are using, see how consistent your rifle is, and how many shots you are getting at that consistency, etc.
Back your hammer spring adjuster out to flush.
Determine if you want to go up or down in speed from where your rifle is currently set. If you want to go up in speed, you’ll want to increase your regulator output pressure. If you want to go down, decrease your regulator output pressure. It is easiest to go in 500 psi increments, but by going to exactly between the marks on your gauge, it isn’t too difficult to go in 250 psi increments if needed.
If you want to fine tune from there, experiment with increasing the hammer spring tension. Increasing the hammer spring tension does increase the force required to cock the gun, so tuning by regulator is the preferred method.