250Z A more efficient way to share tuning "recipes" for the Barra air rifles

[GAJoe]

I have a new 250z with a set of mods that I found while reading pages and pages of comments on tuning the 250z. I want to find helpful reg' and hammer-spring settings with fps goals to get an accurate tune for my slug out of my air rifle.
The problem with the huge thread that I found discussing tuning is that it had comments giving brand and size of slugs, reg' pressure, the number of hammer spring tension screw turns....... and the comments take the thread in different directions making it difficult to track down the recipe that I need. Collectively it's a lot of good info that's hard for a newb to sort out.
Can we have tuning threads with titles that list the air rifle model, generation, caliber, and it's set of mod's so that members with the same air rifle can share "recipes" of accurate tunes that they have developed to help newb's with the same air rifle?
My 250z, Gen2, 25 cal with RogueAir's trigger and slug power kits, the C-88 Air Plenum, and factory porting will take a different recipe than a 250z, Gen1, 25 cal with RogueAir's trigger and slug power kits, the C-88 Air Plenum, and factory porting will just because the number of turns on the hammer spring tension screws are completely different. Not having the same setup wouldn't "disqualify" you from contributing to the thread. But maybe you should qualify the contribution with your reasoning based on what experience you have.
Does this sound reasonable?
Add challenges that this presents and your ideas of solutions please. One challenge would be how do we communicate the hammer spring tension screw setting? By number of turns from where or a measurement from where?

Let me know what you think please,
GAJoe

 

[Billm]

I have a new 250z with a set of mods that I found while reading pages and pages of comments on tuning the 250z. I want to find helpful reg' and hammer-spring settings with fps goals to get an accurate tune for my slug out of my air rifle.
The problem with the huge thread that I found discussing tuning is that it had comments giving brand and size of slugs, reg' pressure, the number of hammer spring tension screw turns....... and the comments take the thread in different directions making it difficult to track down the recipe that I need. Collectively it's a lot of good info that's hard for a newb to sort out.
Can we have tuning threads with titles that list the air rifle model, generation, caliber, and it's set of mod's so that members with the same air rifle can share "recipes" of accurate tunes that they have developed to help newb's with the same air rifle?
My 250z, Gen2, 25 cal with RogueAir's trigger and slug power kits, the C-88 Air Plenum, and factory porting will take a different recipe than a 250z, Gen1, 25 cal with RogueAir's trigger and slug power kits, the C-88 Air Plenum, and factory porting will just because the number of turns on the hammer spring tension screws are completely different. Not having the same setup wouldn't "disqualify" you from contributing to the thread. But maybe you should qualify the contribution with your reasoning based on what experience you have.
Does this sound reasonable?
Add challenges that this presents and your ideas of solutions please. One challenge would be how do we communicate the hammer spring tension screw setting? By number of turns from where or a measurement from where?

Let me know what you think please,
GAJoe

I’m afraid that you might find that with those granular specifications, you might find a lot of the threads will be lonely threads. That’s not a criticism, I’m just pointing out that it’s difficult to get a lot of people to post their tunes in general and will be even harder to find a large number of shooters with the exact same setups. All is not lost though, no two rifles setup exactly the same will shoot the same anyway. The Barra 250z is a good example. @Pumacarl, @Cantona256 and myself all posted extensively about our experiences and tunes with the 250z MKI. All of our guns were slightly different, but the data provided by all of us was interchangeable and useful to at least me. I generally add more information than needed to my posts. I do that to help promote HAM on Google. I do see your point about filtering the info for what you need.
The possible answer to your question for sharing hammer spring settings is the use of a chronograph. It’s far more useful to know what velocity a hammer spring setting gives you, than knowing the number of turns. If I told someone with the exact same airgun as me, that to shoot a specific pellet/slug accurately. I had to set the rifle to 2200psi and adjusted the hammer spring for a velocity of 880fps, I would think that info would be more useful than the number of turns. It’s a little different with Ghosts, FX and Airforce rifles that all have graduated hammer wheels.
I would like to see more tuning threads delineated by slug/pellet that are gun specific.

 

[GAJoe]

I’m afraid that you might find that with those granular specifications, you might find a lot of the threads will be lonely threads. That’s not a criticism, I’m just pointing out that it’s difficult to get a lot of people to post their tunes in general and will be even harder to find a large number of shooters with the exact same setups. All is not lost though, no two rifles setup exactly the same will shoot the same anyway. The Barra 250z is a good example. @Pumacarl, @Cantona256 and myself all posted extensively about our experiences and tunes with the 250z MKI. All of our guns were slightly different, but the data provided by all of us was interchangeable and useful to at least me. I generally add more information than needed to my posts. I do that to help promote HAM on Google. I do see your point about filtering the info for what you need.
The possible answer to your question for sharing hammer spring settings is the use of a chronograph. It’s far more useful to know what velocity a hammer spring setting gives you, than knowing the number of turns. If I told someone with the exact same airgun as me, that to shoot a specific pellet/slug accurately. I had to set the rifle to 2200psi and adjusted the hammer spring for a velocity of 880fps, I would think that info would be more useful than the number of turns. It’s a little different with Ghosts, FX and Airforce rifles that all have graduated hammer wheels.
I would like to see more tuning threads delineated by slug/pellet that are gun specific.

I have a chrony. See my "progress report on slug tuning in my other thread. The info isn't displayed quite as it was as I put it in. But I think you'll get the meaning. I shot several times and put notes regarding those shots to the right and adjustments below. There's probably a more standard way to present the info. If you can steer me to an example that I can pickup and follow. Thanks for your input.

 

[Cantona256]

I’m afraid that you might find that with those granular specifications, you might find a lot of the threads will be lonely threads. That’s not a criticism, I’m just pointing out that it’s difficult to get a lot of people to post their tunes in general and will be even harder to find a large number of shooters with the exact same setups. All is not lost though, no two rifles setup exactly the same will shoot the same anyway. The Barra 250z is a good example. @Pumacarl, @Cantona256 and myself all posted extensively about our experiences and tunes with the 250z MKI. All of our guns were slightly different, but the data provided by all of us was interchangeable and useful to at least me. I generally add more information than needed to my posts. I do that to help promote HAM on Google. I do see your point about filtering the info for what you need.
The possible answer to your question for sharing hammer spring settings is the use of a chronograph. It’s far more useful to know what velocity a hammer spring setting gives you, than knowing the number of turns. If I told someone with the exact same airgun as me, that to shoot a specific pellet/slug accurately. I had to set the rifle to 2200psi and adjusted the hammer spring for a velocity of 880fps, I would think that info would be more useful than the number of turns. It’s a little different with Ghosts, FX and Airforce rifles that all have graduated hammer wheels.
I would like to see more tuning threads delineated by slug/pellet that are gun specific.

I have a chrony. See my "progress report on slug tuning in my other thread. The info isn't displayed quite as it was as I put it in. But I think you'll get the meaning. I shot several times and put notes regarding those shots to the right and adjustments below. There's probably a more standard way to present the info. If you can steer me to an example that I can pickup and follow. Thanks for your input.

Every gun is different. So it’s really hard to give a full “recipe.” But what Bill says is very accurate in the sense that these threads help you build a mental picture of what the gun “likes” or tends to do.

For example I think the Barra does really well with high reg pressures and very little dwell on the hammer. I think a lot of other guys have tuned their gun similarly. It gives the 250 a “snappy” sort of shot cycle that works really well for lighter weight slugs.

 

[hameditor]

I have a new 250z with a set of mods that I found while reading pages and pages of comments on tuning the 250z. I want to find helpful reg' and hammer-spring settings with fps goals to get an accurate tune for my slug out of my air rifle.
The problem with the huge thread that I found discussing tuning is that it had comments giving brand and size of slugs, reg' pressure, the number of hammer spring tension screw turns....... and the comments take the thread in different directions making it difficult to track down the recipe that I need. Collectively it's a lot of good info that's hard for a newb to sort out.
Can we have tuning threads with titles that list the air rifle model, generation, caliber, and it's set of mod's so that members with the same air rifle can share "recipes" of accurate tunes that they have developed to help newb's with the same air rifle?
My 250z, Gen2, 25 cal with RogueAir's trigger and slug power kits, the C-88 Air Plenum, and factory porting will take a different recipe than a 250z, Gen1, 25 cal with RogueAir's trigger and slug power kits, the C-88 Air Plenum, and factory porting will just because the number of turns on the hammer spring tension screws are completely different. Not having the same setup wouldn't "disqualify" you from contributing to the thread. But maybe you should qualify the contribution with your reasoning based on what experience you have.
Does this sound reasonable?
Add challenges that this presents and your ideas of solutions please. One challenge would be how do we communicate the hammer spring tension screw setting? By number of turns from where or a measurement from where?

Let me know what you think please,
GAJoe

@GAJoe Thanks for your post and the great suggestion about a more efficient way to post tuning "Recipes" for different PCP airguns.

If I may, I'd like to contact you by DM to discuss your thoughts on this further.

 

[Cantona256]

@GAJoe Thanks for your post and the great suggestion about a more efficient way to post tuning "Recipes" for different PCP airguns.

If I may, I'd like to contact you by DM to discuss your thoughts on this further.

I’m excited to see what y’all come up with.