Pellet size

[nuggs]

Can anyone tell me that if I bought a tin of say ... .177 jsb exact in 4.53 ,would the majority be 4.53 or just pot luck ? Thanks

[RobF]

Can anyone tell me that if I bought a tin of say ... .177 jsb exact in 4.53 ,would the majority be 4.53 or just pot luck ? Thanks

Pot luck.

[rabbitwrecker]

The number refers to the head size of the die, not the pellet...

[nuggs]

The number refers to the head size of the die, not the pellet...

So if the head size of the die is 4.53 ,what size are the pellets ?

[tinbum]

So if the head size of the die is 4.53 ,what size are the pellets ?

Usually most are from 4.51-4.53, but some may be larger or smaller.

[nuggs]

Usually most are from 4.51-4.53, but some may be larger or smaller.

Getting confused now as I will soon be getting a Steyr hunting and have read many times that it’s better to get the larger 4.53 pellet as could have problems falling out of mag ! So if tins marked 4.53 aren’t really that size why do they apparently stay in the mag better than so called other sizes ? Thanks Mike .

[tinbum]

Getting confused now as I will soon be getting a Steyr hunting and have read many times that it’s better to get the larger 4.53 pellet as could have problems falling out of mag ! So if tins marked 4.53 aren’t really that size why do they apparently stay in the mag better than so called other sizes ? Thanks Mike .

We have a Hunting 5, don't worry about it! The mag isn't designed to be kept loaded in a pocket, and once in the gun the pellets are captive. We use 4.53's put through a 4.50 sizer.

[PhatMan]

nuggs,

If you would like some mind numbing tedium, or an idea for the punishment of naughty children, you could consider using a pellet head gauge :

https://pelletgage.com/

For informational purposes, I went through a few tins of JSB Express, and a few tins of JSB Exact, and found that there is a fair spread of head sizes within each tin, and there is a head-size that is the most common - for the above JSBs, nominally 4.52 mm, 75% were indeed 4.52 mm.

As the above tins were from the same dies (for each type), the information may or may not apply generally ! In addition, I reckon if I did the sorting again, I would probably get different results.

All said and done, I found the most useful aspect of the PelletGage, was that it let me cull the smallest and largest head sizes (4.48 mm, and 4.54 mm for the above nom. 4.52 mm JSBs). The smallest + largest, were, IIRC, around 2 - 3 % of the tin.

Have fun

Best regards

Russ

[Blackrider]

We have debated this one long and hard on here from time to time but yes, as the Guys have said, there is quite a variance in pellet diameters !
I went through the "Pellet gauge measuring excercise" a while back and out of several makes I tried the JSB Exact Express 4.52 were probably the most consistent but even these had inconsistencies.
Its no wonder our groupings are sometimes not as tight as we'd like them as pellets don't always do "what it says on the tin" !

[lensman57]

Can anyone tell me that if I bought a tin of say ... .177 jsb exact in 4.53 ,would the majority be 4.53 or just pot luck ? Thanks

JSBs are undersized, you'd be lucky if 10% were 4.53 or even come close. I once measured 100 JSB 4.52s and the majority were about 4.49 and 4.50. This however does not seem to affect the accuracy . The skirt is however, much larger measuring about 4.68~4.72 mm .

A.G