For anyone that's interested in getting an idea on how much velocity a stock .25 HM1000X can produce, I tested various regulator and HST settings and found the max for 33gr Varmint Knockers and 33.9gr JSB MKIIs was around 945fps with my rifle; the 25.4gr JSBs fly somewhere in excess of 1000fps. This was with my reg tightened down to 73.60mm end to end (probably right at or just under 170bar). I'm able to get very tight ES with sorted ammo when I tuned it down to 920fps.
I suspect the heavy harmonics would interfere with accuracy at higher power settings, adding some big o-rings around the outside of the barrel and/or the bottle might reduce some of the resonance and tame it down to where it's at when set to the factory ~885fps.
I suppose there's some hope for this being a decent longer range slug gun![]()
For anyone that's interested in getting an idea on how much velocity a stock .25 HM1000X can produce, I tested various regulator and HST settings and found the max for 33gr Varmint Knockers and 33.9gr JSB MKIIs was around 945fps with my rifle; the 25.4gr JSBs fly somewhere in excess of 1000fps. This was with my reg tightened down to 73.60mm end to end (probably right at or just under 170bar). I'm able to get very tight ES with sorted ammo when I tuned it down to 920fps.
I suspect the heavy harmonics would interfere with accuracy at higher power settings, adding some big o-rings around the outside of the barrel and/or the bottle might reduce some of the resonance and tame it down to where it's at when set to the factory ~885fps.
I suppose there's some hope for this being a decent longer range slug gun![]()
Nice sharing.
You can also know the exact reg pressure by using a good guage as I have showed in my above post.
I post the pic again.
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In .25 34 grain pellets fps have jumped up by 22. At same settings where 34 grain was going at 900 fps now it goes at 922 fps.
In .22 18 grain jumped so high that I backed out the hammer spring as much as I could do and still get 955 fps with a spread of 3 fps in 10 shots.
It seems that O rings inside the breach and on the pin of the probe has done wonderful job
I have an LRT stock for this gun as well. How do I install or remove it without breaking off the ears of the stock? Can the bottle be removed first?
Crusher
An observation- since receiving my new .25, I've noticed the first shot after a fill always comes out "hot". Probably 10-20fps faster than the following shots. This also seems to follow whatever reg settings that I use. Is this common for this reg?
An observation- since receiving my new .25, I've noticed the first shot after a fill always comes out "hot". Probably 10-20fps faster than the following shots. This also seems to follow whatever reg settings that I use. Is this common for this reg?
Yes, usually the first shot is lower, but yes, never make the fist shot count.![]()
terrymc
I put my raw30 in a br stock and shot 44's at 100 yds into .3 I posted in another thread in here Ken tuned and sent to me. it shoots really well. I feel it can compete with just about anything. I just need practise.photo is a 5 shot group no wind![]()