Model48 (Login Model48) from IP address 69.148.183.46
Springer blues here!
Lately I've been shooting on the tin can range (33yards fro the porch) and all shots are dead on with point of aim. Shooting position is with the left arm (non-trigger) rested against a porch column.
Ran Chairgun with my pellet and 33 yard zero. 16.5 should also be zero. (velocity estimated, no chrony, but similar over a fair velocity range.)
NOPE - about 1-1/2 inches low and right at 16.5. The difference - shooting from a rest vs. the aforementioned column hold. Moving to the column hold - centered left to right, and still about 1 inch low. Still dead on at 33 yards from the column hold!!
I assume the difference in poi is due to the hold, however, playing with chairgun there is no combo that produces the 33 yard zero and the 1 inch low with my pellet!!! got to figure this one out on my own - however:
WTF on the difference between a rested shot and a column rested shot. That's some crazy difference in POI for a change in hold. I'm turning to the darkside in search of consistency of POI with different holds!!!!!!!!!!!!!!!
Might I suggest that guessing the velocity will lead to issues in the Chairgun calculations. Even though I said not to do it, those two zero points are compatible with something in the 780 fps range for cp's in .22......
very difficult to estimate velocity. you need accurate data or chairgun is realy not going to help you. you need velocity and balistic coeficient, correct scope height above bore center. estimating any of these results in bogus numbers.
Rested, you are near horizontal. How far up are you standing on the porch? Although, dead on with a down angle should turn out to be a bit high when shooting flat.
Anyway, the heck with Chairgun. See what it did to your relationship with your gun?
Read some of Harry Fuller's (Yrrah) posts regarding Chairgun on the Main Forum. It can be quite accurate, but every piece of data needs to be correct. No guessing anywhere. Harry is VERY detail orientated and finds Chairgun to be very close to his actual shooting tests.
For differences in POI with the same rifle, but different holds, read some of Robert Hamilton's posts. He fought with his FWB 124 for years with no luck. Invested a fair sum of money trying different tunes, springs, etc. Robert also has an R1 that shot to one POI while sitting and shooting off his tripod rest and a second POI while standing and shooting off the same rest. He finally was able to correct these POI changes with the help of NCED.
Should I tell you the solution, or do you want to do a little enjoyable reading?
Estimated velocity based on Straight Shooters test results. Tried inputing lower and higher velocities and none match my real world results.
I put more faith in the real world results.
Correction - rested - 1" low and 1/2" right. 1/2" low from the standing column rest. Not as bad as I reported.....
Shooting from the rest is approx 2-1/2 feet lower than column rested. prolly not much of a difference due to this......
Since I can't review the responses to my posts while I type a response that's all I can come up with here......
Overall, my post makes comment about the hold sensitivity of my 48. Not so much a comment on Chairgun, its just a tool.... Plinking cans at 33 yards is fine. Dead nuts can accuracy for sure! However, when I hunker down for the shot that really counts (read - tree rat) seems that the POI shifts!!! Confound these dang springers!!! Change a a pellet, change of POI. The list goes on....
Its driving me nuts. I'm bound for the dark side for sure. No offense to all the springer lovers here. In fact, I will continue to shoot my 48 as a first choice on the can range. It's powerful and self sufficient. But when it comes to "one shot - one kill accuracy" me and the 48 are not the right combo. Hopefully some day.....I'm not giving up, just going to find a different tool for a certain job.
Of Course, theres the little issue of the dark side cost....I'll keep working on my technique for the time being.
Define "rested". How do you rest the gun while sitting compared to standing? Moving your hand an inch can throw some guns off. Plinking ok but that "must make it" shot not? Could be over-thinking. When plinking, you're relaxed. If you feel you must make a shot, you can tense up in terms of hold and even trigger pressure. Just think of the squirrel as a beer can!
I wouldn't put a lot of faith in Straight Shooters' reported results. I have seen some strange data in their pellet tables where the fattest slug is doing a lot more fps than its lighter brother, for instance. And it's my understanding that those fps numbers are for one gun with who know how many shots under what conditions? If what everyone on the boards reports is true, you can't assume that one airgun will shoot the same fps as an identical one of consecutive s/n. If only for pellet to pellet fit variations and how the barrels were reamed/rifled since nothing, including cutters, stays the same.
or maybe treason are your words on the M48 and for heresy you burn at the stake for treason you face a firing squad LOL
you miss with a M48 and it was you and not the air rifle even at 60 yards' it's your fault not the 48
anticipation, incorrect hold or trigger squezze
the squirrel is 60 yards away and the 48 is 60 yards behind, the shooter is in between the target and the air rifle belongs to YOU to determine that shot you make
a can is a can and a paper target is only paper but that squirrel is different under the mil dots of your scope
bet you if you where hungry you would not miss throwing a ROCK to eat a squirrel at 10 yards and you miss one at 60?? with a M48??
shot once, shot twice, shot 100 times and master that 48
check loose screws, mount and lousy pellets, it's not the M48 and not the shooter you are
bag one for me in time
warren
PS: and stop the AAAHHRRRGGGHHH, it just builds up your blood pressure, not good for the M48 or for you, maybe good for the squirrel LOL
but sadly not with me!!! No hardware problems - screws tight, scope tight, I'm just not doing my part! And yes, the rested hold is different than the standing hold and therefor a different point of impact. I'm just amazed at the amount it can throw the pellet off by just changing the hold!!
and by the way - I'm just kidding about going to the dark side, sort of!!
Rest the fore-stock on the top of your hand not on your palm. Or between the thumb and forefinger but don't wrap around it. Hold your action area like it's a pistol with your thumb pointing up to the safety and your trigger finger tip on the trigger not the crux of the first joint. Don't rest your cheek on the comb but just tickle the wood with your stubble. Just let the butt of the stock rest against your shoulder so there is no backward movement (this is where your elevation poi changes) if you let the gun slide back your POI will change. Try some RWS 14.5 Super Domes or find some Beaman Bearcub 14.4s. Very clean and accurate pellets for me.
