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Search: Posts Made By: jaia
Forum: .22 Ammunition (S-L-LR) Today, 11:45 AM
Replies: 112
Views: 6,590
Posted By jaia
I've added another data column....charge...the...

I've added another data column....charge...the total amount of combustible in each cartridge.
...
Forum: Open Rimfire Today, 11:31 AM
Replies: 74
Views: 3,614
Posted By jaia
Lucky for me, I have quite a few years of...

Lucky for me, I have quite a few years of shooting over a ballistic chronograph.
Almost every trip to the range, that chrony is out front so I can tell if it was me, or the ammo.
What I see in the...
Forum: Open Rimfire Today, 06:29 AM
Replies: 74
Views: 3,614
Posted By jaia
Called pulls? Unlikely. Why? You were doing...

Called pulls? Unlikely.
Why? You were doing your best to produce a tight group.
Those two shots fall within the same vertical alignment as the rest of the pattern.
You were a victim of mv...
Forum: .22 Ammunition (S-L-LR) Yesterday, 04:51 PM
Replies: 112
Views: 6,590
Posted By jaia
Steve, in the 50 at 200 thread in the RFC long...

Steve, in the 50 at 200 thread in the RFC long range forum,
I did deliberately damage the drive bands and bullet noses.
Multiple boxes of cartridges, several times.
Documented the results. Nose...
Forum: .22 Ammunition (S-L-LR) Yesterday, 04:17 PM
Replies: 112
Views: 6,590
Posted By jaia
Too many variables, not enough information. If...

Too many variables, not enough information.
If the primer is a significant proportion of the propellant, it can have a major effect on chamber pressure
and that could cause a difference in mv. I'm...
Forum: .22 Ammunition (S-L-LR) Yesterday, 02:56 PM
Replies: 112
Views: 6,590
Posted By jaia
MV spread and bullet uniformity are my concerns. ...

MV spread and bullet uniformity are my concerns.
Eley bullets aren't covered with dents and dings
and the drive bands and seating are extremely uniform in appearance.
Primer amount variations as a...
Forum: .22 Ammunition (S-L-LR) Yesterday, 02:37 PM
Replies: 112
Views: 6,590
Posted By jaia
You got it Steve. Look at bullet weight spread...

You got it Steve. Look at bullet weight spread and powder spread.
Another surprise for me was the primer amount showing up as almost equal to the powder in Eley.
Bigger variation percentage-wise of...
Forum: .22 Ammunition (S-L-LR) Yesterday, 09:12 AM
Replies: 112
Views: 6,590
Posted By jaia
Already did a drop test of the Eley style primer...

Already did a drop test of the Eley style primer Al.
A single 36 inch drop, with a padded shipping box, same as UPS/FedEx
knocked primer from the rim in 6 out of 50 cartridges.
I see that same...
Forum: .22 Ammunition (S-L-LR) Yesterday, 08:57 AM
Replies: 112
Views: 6,590
Posted By jaia
Another week of tedium accomplished. Tenex, 50...

Another week of tedium accomplished.
Tenex, 50 cartridges disassembled and weighed.
Data entered into the spread sheet, here's the results...
...
Forum: .22 Ammunition (S-L-LR) 09-19-2021, 09:21 AM
Replies: 16
Views: 643
Posted By jaia
Interesting thought L3G. How would you...

Interesting thought L3G.

How would you verify this without incorrect conclusions caused by small sample size?

Just thinking here....

How to minimize production line variations in cartridge...
Forum: Open Rimfire 09-16-2021, 03:11 PM
Replies: 74
Views: 3,614
Posted By jaia
And it's worth noting that the above is not an...

And it's worth noting that the above is not an argument about groups v "grids".
Rather the point is that it's not possible to regularly and deliberately
hit a small point of aim at long distances...
Forum: Open Rimfire 09-16-2021, 01:11 PM
Replies: 74
Views: 3,614
Posted By jaia
Doc, I use a 2 to 3 inch interval on the grid. ...

Doc, I use a 2 to 3 inch interval on the grid.
I have a 2 inch wide straight edge and eyeball the spacing to fit the cardboard.
Wide tip marker provides a heavy line that doesn't obscure the scope...
Forum: .22 Ammunition (S-L-LR) 09-16-2021, 11:44 AM
Replies: 112
Views: 6,590
Posted By jaia
I've made it through 10 of the Tenex....much more...

I've made it through 10 of the Tenex....much more consistent numbers, less deviation.
Still a tedious and annoying job. Bullets are right at 40 grains, powder running about 1.08 grains,
primer is...
Forum: Open Rimfire 09-16-2021, 09:13 AM
Replies: 74
Views: 3,614
Posted By jaia
It's possible to use a grid for assessing...

It's possible to use a grid for assessing performance at any distance.
The problem would be trying to determine what size of a dot to use.
The greater the distance, the larger the dot.

Good...
Forum: Open Rimfire 09-16-2021, 05:34 AM
Replies: 27
Views: 900
Posted By jaia
Range bag is now a tool bag kept behind my truck...

Range bag is now a tool bag kept behind my truck seat.
My range box is a hefty Stanley Fat Max 28" tool box. Big, water tight, strong,
protects the contents from being crushed by all the other junk...
Forum: Open Rimfire 09-15-2021, 07:23 PM
Replies: 74
Views: 3,614
Posted By jaia
Proprietary targets there, Joe. Or else...

Proprietary targets there, Joe.
Or else plotter, ink and paper expenses.
But a chunk of cardboard and a marker from the junk drawer,
same effect, without the expense or technology needed.
It's...
Forum: Open Rimfire 09-15-2021, 11:52 AM
Replies: 74
Views: 3,614
Posted By jaia
I hear ya' Nick. It's just a pet peeve. :D ...

I hear ya' Nick.

It's just a pet peeve. :D

All those purdy groups showing all close and tight for 5 shots,
yet when you look at each cluster relative to the aimpoint, they're sure as heck...
Forum: Open Rimfire 09-15-2021, 08:00 AM
Replies: 74
Views: 3,614
Posted By jaia
Mirage theory? Please elaborate. Most only...

Mirage theory? Please elaborate.

Most only think of mirage as heat caused shimmer at extended distance.
Causes distortion or apparent image movement through y'er scope.
There are also those who...
Forum: .22WMR Ammunition 09-14-2021, 06:20 AM
Replies: 4
Views: 402
Posted By jaia
Y'all act like 40 cents a cartridge is a big...

Y'all act like 40 cents a cartridge is a big deal.
Hows about some RWS 22wmr? :rolleyes:

https://i.postimg.cc/W4hsQPhY/rws1.jpg

https://i.postimg.cc/QdFPDNJ7/rws2.jpg

Sad part is, it's bulk...
Forum: .22 Ammunition (S-L-LR) 09-13-2021, 04:28 PM
Replies: 112
Views: 6,590
Posted By jaia
No need PS. Thanks for offering. I've done the...

No need PS. Thanks for offering.
I've done the low end of the rimfire spectrum, the Tenex will be the high end sample.
My guess is, the results will be boringly uniform. All that's needed is doing...
Forum: .22 Ammunition (S-L-LR) 09-13-2021, 01:54 PM
Replies: 112
Views: 6,590
Posted By jaia
Popcorn is good...as long as you have the...

Popcorn is good...as long as you have the Lawrey's to go with it. ;)

Crowns are okay with popcorn, not so good with taffey. :( :D
Forum: .22 Ammunition (S-L-LR) 09-13-2021, 08:59 AM
Replies: 112
Views: 6,590
Posted By jaia
Steve, lead styphanate is the material currently...

Steve, lead styphanate is the material currently being used as primer here in the US.
It's a high explosive with steep pressure curve. With the range of weight variation I measured,
the percentage...
Forum: .22 Ammunition (S-L-LR) 09-13-2021, 08:53 AM
Replies: 112
Views: 6,590
Posted By jaia
"They" is an assortment of old coots, codgers,...

"They" is an assortment of old coots, codgers, curmudgeons and contentious nit-pickers,
that enjoy arguing over coffee after a morning of shooting benchrest 22lr.
For some reason, I seem to fit...
Forum: .22 Ammunition (S-L-LR) 09-13-2021, 07:57 AM
Replies: 112
Views: 6,590
Posted By jaia
Yep, they're punishing me alright. :D I...

Yep, they're punishing me alright. :D

I dared to argue that CCI SV is bulk 22lr and not the greatest ammo.
When they saw the spread sheet and the variations in weight, there was some hemming and...
Forum: .22 Ammunition (S-L-LR) 09-12-2021, 06:42 PM
Replies: 112
Views: 6,590
Posted By jaia
Arguing ammo quality over lunch with the other...

Arguing ammo quality over lunch with the other old coots,
comparing variations in component weights, I was "volunteered" to run another box of 22lr.
Seeing as I have the scale, the tools, previous...
Showing results 1 to 25 of 500

 


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