Hi:The smaller probe bolt has been tested.This was in Nov 06 71 degrees in FLA here are the specs....I don't have the factory stock 2240 specs (i lost them but it was not more than 400 this is with Daisy Flat heads 22cal


First 4 shots gun was empty.Bone stock 2240... except for 5/8 bolt probe.....

Shot 5..435.3
Shot 6..439.1
shot 7..427.9
shot 8..430.6
shot 9..426.9
shot 10.423.0
shot 11.415.4
shot 12.419.4
shot 13 420.0
shot 14.412.0
shot 15.414.0
shot 16.405.0

Wow I am quite happy with this.It is also way way louder wich is kind of fun.Compaired to facttory the pellets seem to be being blasted out the barrel.

I can't wait to test the 3/4in probe. I have these and a lot of the 3/4in ones.I also have 20 cal walther barrels,that FIT CROSSMANS!!!! 17in and way cooler looking than factory brackets for 22xx guns.And side cocking hammers for 22xx crossmans,will be doing side cocking conversions soon..Check out www.pneumaticforays.com

It would send those pellets into outerspace!

The gains are significant.At least it is profesional thought out machine work,Im mean I feel bad I can't keep up with the,know it all dremal tool crowd around here, that produce crap but I think I will get over it.HeHeHe Alex

the "blasted out the barrel" meter is off the charts

Honestly, it was just a friendly jab, hence the smiley. What I was hinting at is that there are no more gains to be made once the probe is made long enough for the pellet to fully clear the loading port.

I actually just finished making up a bolt and valve stem today.

This is all the prob you need, at least for .177.

You are right, about past the port and diminshing returns,longer only does so much good.Also the factory probe is just so off target it is wierd people don't get that.

I did not mean to over react, (the machinest draged his ass makeing these)it's a touchy subject,and I actualy respect people that can do stuff with a dremel and a drill press,some of it is amaizing but some of it is duffus.

Also there is a lot of "Different is bad"mind set out there that is annoying,and "Different is wrong" mind set that is as dumber than a pile of #$#^&%*.Again just look at the factory and a moded bolt comparison.

It is also nice to have the chrony results.I apriceate you reading the post and hey we just want to help America have fun,any of the set up moders desirve a lot of respect it is hard work..Few people can grasp what a pain in the ass it is to be in business between the irs the local state free loading goverments.. it is worth it if it is a fun business i would not do anything else the Mc1's Bryan &associates Quackenbush desirve respected and be apriceated... it is not exactly like puting your head on a gillotine but its close to it.Again Thanks Alex
Alberice

Hey Alex,

I had to go back aways to find this, it's been a while since had a 'bone stock' 2240. From 8-18-2005 Chrony tape, CHWC 14.3 gr.: 425.59 Avg.; 30.76 SE; 10.29 SD; 5.7 FPE. Temp. 77 deg.

1. 432.54
2. 440.30
3. 435.36
4. 429.14
5. 433.74
6. 426.80
7. 409.54
8. 414.36
9. 416.92
10. 418.06

Your extended probe bolts sure are pretty, I'm not convinced of their function however!

D R

The evidence speaks for itself exactly what more do you want? They are effective because the time the co2 or air builds up presure is increased,(ITS CALLED DWELL TIME)Ive shot a stock co2 2240 above 80deg with 14grainers and they never got above 400,so have pleanty of other people.Daisy flat heads are 13.9 I beleave.In any case it did not get above 400 even with those it might be because it was 71deg,with the stock bolt.Trust me the bolts work.They also do not bend,incase you were wondering about that also.I have one in a pcp 2250 custom tube and fill it to 2000-2700 and shot it 100dreds of times.It is a press fit hardend dowel pin.Do you honestly think I would be doing this if didn't work?Alex

Alex,

I put the proof on the page, if you had a 2240 that couldn't break 400 fps you had a dog. Most likely it had a problem and you fixed it when you installed the new bolt. Increased 'dwell time' whatever you want to call it, spells inaccuracy to me, as in looonnnggg lock time. It ain't all about speed, it's about hitting what you're shooting at!

D R

Actualy I have had a 2240 that got above 400fps with 14grainers @above 80degrees.But it was only like 405,410 and it was more like 90deg summer in FLA.This is not uncommon, the specs you posted are not the norm.We advertise 20fps increase and this is truthful it is at least that much increase .What you are saying,(and not seem to be saying,but saying) is that there is no way the extended probe does anything to increase velosity and you are very very sincere but sincerly wrong!!!Also lockup is a term for springers it does not apply,here. There is no perceivable lock up in co2 and pcp's Thanks Alex

Lock time has nothing to do with lock-up; and I agree that a 2240 that can not break 400fps with a 13 or 14 grain pellet at temperatures over 75 degrees is a "dog" Neither of you give all the info needed to decide what is what, time between shots nor distance of chrony from the muzzle?

The extra long probe may result in faster FPS because you are driving the pellets futher into the lands and gooves thereby engraving the pellets with the push of the bolt, without pellet skirt expansion, not the push of the gas. It would be interesting to see the accuracy changes that occur as a result of ramming the pellet into the "throat" of the barrel with the extra long probe not just that the pellets fly faster.

Not enough information/data has been provided and not enough data from one gun let alone data showing that the extra extended bolt probe does it in multiple guns.

JMHO shootski

Shootski,

What is you need to know? I have Lil' Chrony Master Gamma it was placed 12 inches in front of the muzzle. I was shooting indoors, the temp. was 77 degrees. My 2240 was new and the only thing I had done was tune the trigger. The numbers are as real as they can be. There's is only one reason I can see for a extended probe and that is to make sure the pellet is beyond the port. In a full tuned gun and/or configured as PCP it may allow additional flow. I prefer a flow-thur bolt design myself but see no need for one with a stock valve. Simple spring changes and a piece of tubing (of the proper length) placed over the valve stem does wonders.

This is that same 2240 reconfigured as a rifle every part in it is from Crosman. It's not a 'Hot Rod' but it does shoot very consistently.



D R

Oops, ;( "every part in it is from Crosman"! Not true, I made the remote adapter. dr

Well DR lots of things, but not right now...my point was simply that the guy selling the idea of an over extended probe didn't give me enough data to make any decision on spending that much for his looooooong probe. I have a DAQ flow-thru bolt on my 2550 and I can't say enough good things about the "Masters" execution. Your data is welcomed and clearly makes my point. A lot of numbers and some breathless hype was being tossed around Now you added the last few facts and made your point dead on! Facts is Facts My money is on flow-through bolts that dont ram pelets into the throat.

Thanks DR,

shootski

Alex,

You said, "There is no perceivable lock up in co2 and pcp's Thanks Alex". Alex my friend you are so wrong. Any time the pressure Co2 or O2 gets higher than the striker/spring combination can over come you will have valve 'lock-up'. With what I have that temp is about 95 deg. and it starts to slow down at 88 to 90 deg.
Now, lets not confuse 'lock-time' with 'lock-up'. In the air gun community lock-time is understood to be the time elapsed between sear release and the time the pellets exits the barrel. My understanding of your 'dwell-time' will only increase the 'lock-time'. Not a good thing when it come to accuracy.

D R

You are right about lock time and lock up.Lock time is a springer term,when the trigger is pulled the pellet exits the barrel. lock up is when there is valve issue pcp and co2. Im am going to settle this I will pray and heal you guys of everything.... No just kidding, ..but I did stay at a Holiday Inn last night...No im kidding about that too...HeHe but I will re chrony this and post the specs.

The increased dwell is not that much to effect the lock time,... you can't feel it.Which is what the posters concern was and i believe he said lock time I totaly forget. I am also well aware of the barrel rifeling and accuracy conserns,I have address this and have a 20 barrel with a 60 deg "on ramp"I call it from a 1/4center drill.177 and 20 require barrel mods.I will re chrony with a stock 2240 with the factory brass, 5/8 and 3/4in probe bolt.I can even get interesting and use a Quackenbush breech and a 20cal barrel and still just with stock gun specs.The gun willhave no valve modes and no spring mods,will stick with 22cal crossman barrel everything nice and stock for openers.Thanks for your imput Alex Alberice President Pneumatic Forays llc