Some advice about Sizing Pellets. Where to go from here...?

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davidsng

davidsng

Member
Jul 11, 2017
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Rochester, MN, United States
Alright. I got a new gun. Always noticed a few shots were lower than the rest of the group (a few strays always low), only noticed around 75 yards.

I was hoping sizing would clear this up, since the fatter pellets would slow down going through the choke, I thought. I bought a sizer 5.52. Here are my groups a 50 an 75. (Wind was a small factor.)

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The sizing was slightly WORSE. I sized pellets for another (different) gun and groups were slightly better.

The ran them over the chronograph and found Sized and UN- sized were shooting about the same speed 813-842fps roughly, with some dropping below that with UNSIZED pellets.

Originally 850fps was the average speed, so the gun definitely became slower. Not sure if it was because of the regulator or the hammer spring,.. but I tuned it back up to 865 or so with the hammer spring tension.

My questions now are "what next?" ? Is the 5.52 dia just too small for the choke? Should keep trying sizing and buy a 5.54mm? Would they just be heavy pellets? (I don't want to start weighing.) Should I buy a HUMA regulator? Do Huma's really help extreme spread? How would you lift a few low shots from a group? If they could be lifted I'm MOA out to 75 yards, consistantly.
 
Read this about pellet sizing.........

https://www.pyramydair.com/blog/2005/05/is-pellet-sizing-a-waste-of-time-maybe-not/

I can't find the link but there is a head sizing plate to check the size. Watch one of Tomcats videos about all the step required to find the perfect pellet. And yes you must weigh them. The short and curly of the steps are: wash, light lube, weigh, yar roll, then head size. Or something like this. Tom is on here but check him and many others out on YouTube. With a very gun that you have, I think it would be worth the time.
 
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...Because it's raining for a long time and I can not shoot and I decided to weigh the JSB pellets I have - 5 types in 22 caliber, among which and Lead Free and Polymag ... the weight differences are INCREASING !!!

For each model, about 10 to a maximum of 15% are as indicated on the box as the increasing weight percent drops sharply ...

There is not a single pellet in a Polymag that weighs as much as it says on the box!

Best of all, JSB Exact Jumbo RS.

In general, the quality of the world's best-selling pellets JSB is pretty much understated now ...

... Next H&N... 
 
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i used pellet gauge with a ton of different .177 brands but it did not improved anything.

we are talking about such a small difference in the size..

i had many 4,48 jsb in one tin. lable said 4,52

did i measured correctly ? is the pellet gauge correct ? do i have to spin the pellets ? oh, now it does fit.

i say its not the best tool for measurments with such a small diameter.

i have shot with "sorted" pellets but it made no difference overall. it was not consistent.

maybe in unchoked barrels ?



btw H&N Pellets were MOST consistent in head size. extremly good!!!!

but that did not helped when your barrel does not like them :D

my next test will be with weighed pellets.
 
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I've gone threw 2500 H&N Target, hunter 14.66 gr. 5.55 on tin. Some of the tins I have to push in and some go in easy. Out to 30yds doesn't seem to matter. The biggest issue i have here in Phoenix is Temperature. after it get over 100f it does effect my accuracy, out to 45yds. Got some Crossman Parranas 14.3gr. they just fall in, but shoot better in the higher temps. 
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My biggest thing for my Diana is pest control, so I don't need to stack them pellets. IN the last couple days I got 8 round tail squirrels and three rabbits.


 
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I have a Huma in two guns and would recommend them. As for the pellet gauge there is one way it works and only one way it works to give you reliable results. The head of the pellet has to be square to the hole as it approaches. If the round doesn't fall through the hole on it's own, then move to the next larger hole. The Pellet Gauge is not designed to resize rounds, only measure their existing size.

Now this next part is going to seem rough, but perhaps the shooter isn't up to the level that sorting will make a difference in group size? Once you've removed the mechanical aberrations there is only the human pulling the trigger left to work on. Good luck with your gun Sir.



Upon further thought your gun/barrel may not be better than the groups it's giving. Not every gun, nay nearly any gun shoots hole in hole and 50+ out of the box. So keep testing and tuning because that's what it will take to tighten up those groups.
 
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