Tuning Pro sport FPS

[Ozwald]

I checked my velocity this morning using crosman premier 14.3 pellets in .22 cal

702, 715, 739, 734, 725, 728, 728, 729, 728, 725.

739, 727, 726, 726, 730, 725, 725, 721, 725, 733

I was wondering how that compares with other pro sports in .22 cal. Thanks Steve!

 

[DualMagMike]

Straight shooters results;


.22 Caliber Pellets

 

[AirShot]

You have a pretty wide spread on your velocities, is this a new rifle? Might be time for a tune up, even a simple quick tune at home should improve that consistancy. A change in pellets may also improve your numbers. With almost 30 fps spread your accuracy will suffer.

 

[tjmac]

If you drop the first two shots, the spread is only 18 fps. I never chrony a springer before putting 3 to 4 shots through first.

Tim

 

[Ozwald]

Thanks for you're replies, Yes it is a new gun about 1000 pellets through it. What is an acceptable spread for this rifle and velocity. Thanks Steve!

 

[GoldenStateAIRGUNer]

Pellet quality can cause that kind of ES. Not only from weight variations but pellet bore fit as well. I have found Air Arms pellets to be more consistent in weight than JSB's. I weight my pellets for purpose of getting the most accurate picture of how consistent my rifle is. My suggestion is to try different pellets. The acceptable spread in my mind is probably about 20 fps at the most.

 

[Ozwald]

I am having a hard time trying to get pellets every one I try says they are sold out here in canada can only seem to get corsman pellets. Steve!

 

[tjmac]

Air Gun Source is showing AA .22 pellets in stock. I think he got a shipment from AA a week or so ago.

Tim 

 

[AirShot]

Pellet quality can cause that kind of ES. Not only from weight variations but pellet bore fit as well. I have found Air Arms pellets to be more consistent in weight than JSB's. I weight my pellets for purpose of getting the most accurate picture of how consistent my rifle is. My suggestion is to try different pellets. The acceptable spread in my mind is probably about 20 fps at the most.

With a new gun that has not had any kind of tune/ lube an extreme spread of 20 is about right, with a simple clean, polish, deburr and proper lubrication with the right pellet should be down to 10 or less. I also agree with the AA pellets, while I dont weigh them I do sort thru them and remove any that are deformed. My TX prefers the 4.52 head size, something else he will need to experiment with. With 1k shots thru his rifle he is well past time for a simple tune. I have no doubt he will see improved performance.