Monthly Rimfire Match Archive

[surfNshoot]

Finally was able to get out to Chabot Sunday.

Had a couple others to sort out and thought to bring my 10/22.

It has a Volquartsen barrel and my trigger job, bolt upgrade (includes grinding to .044" head space and radius rear for smooth action) bedded in an old stock of unknown manufacture. Bolt release mod and a Volquartsen Exact Edge extractor. Made my own scope base too. Uses my own set screw V-block, Allen take down bolt and my extended mag release. When bedding, I in-letted a tight fitting aluminum insert for the takedown bolt that acts like a piller to dampen movement.

Put on a Barska 10-40 x 50 and used a lead sled.

SK Standard Plus ammo.
I did measure rim thickness and grouped in boxes that all were within .0005".
Did notice small impact change when going from extreme measurements.

50 yards scoped.
[ATTACH]179008[/ATTACH]
[ATTACH]179012[/ATTACH]

A couple are close the the edge but do touch and I can mail original target if asked.

Nice shooting Calif Mini. Of all the times we have posted that target YOU are the first to clean it!!! Congrats!!!

[usmcchet9296]

Nice shooting Calif Mini. Of all the times we have posted that target YOU are the first to clean it!!! Congrats!!!

Yeah we all have come close but never cleaned it
great shooting

[usmcchet9296]

Shot the 50yd Iron Sight Target today with my Kimber 82G, Aperture Sights and SK Std + ammo. Score is 122. Best I have ever shot with this rifle. Slight cross wind maybe 3-4 MPH.

Damn you beat me

[Izzy43]

Damn you beat me

About time, you've eeked me out for the last several months on the 25 and 50yd irons. Just don't count on me doing it again but I'll sure be trying. Funny how competition can make us (at least me) a better shooter. Wish more folks would join the fun.

[Izzy43]

Nice shooting Calif Mini. Of all the times we have posted that target YOU are the first to clean it!!! Congrats!!!

Great shooting, lot of stress in that last shot. What method do you use to measure rim thickness? SK Std+/Wolf MT is also my ammo of choice, best for the $$$ going in my opinion. Keep shooting with us, new targets every month.

[surfNshoot]

Great shooting, lot of stress in that last shot. What method do you use to measure rim thickness? SK Std+/Wolf MT is also my ammo of choice, best for the $$$ going in my opinion. Keep shooting with us, new targets every month.

Can always pickup one of these

http://www.youtube.com/watch?v=km_wisoLVzk

or I think people have used an empty .223 round case and slide the round in the neck then mesure the overall length. Someone correct me if I'm wrong.

[Izzy43]

Can always pickup one of these

http://www.youtube.com/watch?v=km_wisoLVzk

or I think people have used an empty .223 round case and slide the round in the neck then mesure the overall length. Someone correct me if I'm wrong.

Thanks, think I'll make one like the Hornady out of hardwood. Should be easy.

[surfNshoot]

Thanks, think I'll make one like the Hornady out of hardwood. Should be easy.

Any wood will be to soft for real consistant messurments. Not when you are talking in .001 inch

[surfNshoot]

this would be a cheap better way IMHO http://forums.thecmp.org/showthread.php?t=6479

[surfNshoot]

this would be a cheap better way IMHO http://forums.thecmp.org/showthread.php?t=6479

[surfNshoot]

woops. thought my computer got stuck.

[Calif Mini]

Rimfire case rim thickness

Great shooting, lot of stress in that last shot. What method do you use to measure rim thickness? SK Std+/Wolf MT is also my ammo of choice, best for the $$$ going in my opinion. Keep shooting with us, new targets every month.

I used a little piece of 12L14 bored out to simulate a chamber. (Actually thought of getting a Bentz chamber reamer to make one) and dropped rounds in and used a dial indicator that measure in tenths of a thousandth of an inch.

Found almost .002" spread in 600 rounds. Grouped first box with the shortest rounds and used these to "foul" the barrel and warmup.

Then marking boxes 2 - 2.4, next 2.5 - 3.0, next 3.1 - 3.5 and finally 3.6 plus.
These numbers were only for reference and have no direct height meaning.



Originally thought I was going to sort by .0002" but there is a lot of variation when sweeping over the rim with a sensitive indicator so went with .0005".

[Smidge]

Hey guys nice shooting. I want to give this a go can I use peep sights or do they have to be open.

[Izzy43]

Hey guys nice shooting. I want to give this a go can I use peep sights or do they have to be open.

Peeps are fine for the Irons Sight Targets, that's what I use.

[10xhobby]

NOVEMBER PISTOL MATCH TARGETS





15 YARD OFF HAND 126
15 YARD BENCH REST 174

25 YARD OFF HAND 80
25 YARD BENCH REST 113

These targets are not my best but we will continue to improve next month.