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50 at 100

63K views 418 replies 58 participants last post by  cznut 
#1 · (Edited)
As the title states, 50 shots at a single aimpoint at 100 yards.
Any rimfire rifle, or pistol, any caliber, any setup you like.
Not everyone has access to a 200 yard range, but most have access to a 100.
Let's see just how tight those clusters can be with ye'r favorite rig and the cartridge it "likes".
No rush, take ye'r time, use windflags and/or one piece rests.

Benchrest competitors...ya' don't have an excuse not to show what can be done.
Ya' don't even have to change the vertical adjustment on the scope, only the focus/parallax.
Just remember the poi will be 7 to 8 inches below ye'r 50 yard crosshair setting.
Here's a chance to show what can be done with ye'r custom setup.

That's 50 shots, all at the same aimpoint, at 100 yards.
Indoors, outdoors, offhand, bench, prone, are all acceptable.
Include pics of the setup, the view downrange, the cartridges
and the results with a ruler alongside the group for reference.
Include wind direction and velocity to see how it affected the trajectories.
You don't even need to chronograph the results.
We can figure that out from the vertical spread. :D

There are lots of claims of all day long,
let's see what really happens for just one box of ammo.
See if those "all day longs" actually hold up. ;)

I have some assorted leftovers from the 50 at 200 to work through.
Might as well send them at 100 yards as a comparison.

I'll link the results in order by cartridge and brand for easy searching.
Spectacular results will be highlighted for envious ogling. :rolleyes:

To review results produced at 100 yards in a testing tunnel see the 25 at 100 thread.
 
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#61 ·
Couple things this shooter found harder. Hold offs. Sometimes you can’t see where the last shot went (identifying trends) and having a good sighter bull for when conditions change.

Wimped out and just held center.

Looked at it as the elevation was the ammo but the windage was me.
 
#62 ·
I don't attempt hold offs CM.
I simply wait until the flags and berm vegetation show minimal movement.
The 50 at 100 is not a timed event, I wait for the lulls to make the squeeze.
It's only 50 shots and I have all morning. When there's no wind,
I can go through a box in about 20 minutes. On a day where it's puffing,
It can take an hour plus due to having to fit the shots into the best moments.
It doesn't work during tailwinds though. Never can tell where the turbulence is. :(
 
#64 · (Edited)
Shoot all of them Jim. That indoor range should make for some decent results.
As long as ya' keep posting these targets,
I'll keep track and link them on the first page for easy searching.
I checked my collection last night, quite a few single boxes to use up.

Don't forget pics of the range and rifle. I like my rifle pron. ;)

Be careful with the Copper22.
I had 6 inches of spread at 50 yards and 17 inches when attempted at 100 yards. :eek:

 
#66 ·
Islander made this contribution...

Quote: Went to the range this morning before the wind got too bad.
I only have a couple of boxes left of what this rifle likes
so I did the "whole box" test with some other stuff I had in the cabinet.

Eley Sport



Federal Gold Medal Match
It wasn't horrible, with just two flyers.



Once I get some more of the good stuff, I'll try that.
Rifle: MPA BA22, cz455 action and their barrel, Timney trigger.
Scope: Sightron S-Tac 4-20X50

 
#67 ·
Krob95 offered these results

Quote: So disclaimer on the below pictures.
I had pulled a couple shots high on both the center x and midas plus groups
due to breaking shots with someone shooting next to me. My point of aim was
also destroyed due to shooting it out so if I do another 50 rd group
I am going to dial a false zero so I have a consistent POA.

I only counted the outer most shots to get a good idea of overall spread.
If you guys think I should count more please let me know and I will.
(I ran 50rds midas plus prior to the 50rd group to let the barrel acclimate to the change in ammo if needed)
100 yard indoor range, without further ado, here are the groups.

Rifle specs are as follows:
Vudoo V22 Gen 1.2 w/ 18" Proof Carbon fiber barrel
TriggerTech Diamond 2 stage
Accuracy International AIAX chassis
Zero Compromise 5-27x MPCT2 in a Spuhr 6002 mount
MDT Ckye Pod
OG Str8Laced bag with heavy fill



(Black stickers are 1" for reference)

Center X



Midas Plus

 
#70 ·
SK Biathlon
Bergara B14R
Vortex strike eagle 5-25x56
front and rear rest
Zeroed calipers at -0.215 so measurements are center to center
Lab Radar chrono
Hi 1156
Lo 1105
Ave 1118
ES 51

Wind kept changing directions - from the left, right and rear

On a side note - that's the highest ES I have seen from SK Biathlon. I deleted that one hi shot (1156) from the chrono results and the ES dropped to 26
 

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#73 ·
The SK Long Range results look good.

The SK LR's ES of 27 fps is very low. It is a good batch of ammo on that count, at least this particular box. The vertical spread of 1.21" is greater than the ES alone would predict.

That goes to show that, while a low ES is crucial to producing smaller groups especially as distance increases, there's more to good results at longer ranges than ES alone. Other factors include imperfections in individual rounds, minute differences in dimensions between rounds, differences in crimping as well as the difficulty of executing each shot as perfectly as the last.
 
#75 ·
From Norway, barronian adds this...

Quote: Here are two 50 at 100m results. the first one is with Eley Match,
the second one with Center-X. all the other holes are just me getting the barrel and me
used to Center-X after using Eley Match for months.
Easy to see my somewhat variable concentration :eek:

Sig Sauer STR 200 in GRS Hybrid stock
Delta 5-50x56



If you exclude my fliers then the main clumps are very close to what the ES predicts at 100m.

 
#76 ·
Also from barronian

Quote: Well, i wasn't very happy with my results yesterday,
so i tried to do better today .... at least i tried !
What i did learn was that Center-X is very temperature sensitive,
much more so than i would have expected and much more so than Eley Match.

The top right hand target was shot first, with ammo from the house
that had a powder temp (initially ) of about 18C (65F). Avg vel 1040 f/s, ES 42.

The Top left hand target was shot about 90 mins later when the powder(and gun)
temp had fallen - probably closer to the 6.8 C (44F) air temperature.
The POI change is rather obvious. Avg Vel 1012 f/s, ES 44.

Strelok gives me 0.5 mil drop with this temp change - very close to what i see.
Lapua Ballistics doesn't show any temp sensitivity at these temperatures.

What are other peoples experiences with temperature sensitivity ??
Do you leave your ammo outside to acclimatize ? Or do you try and keep it warm ?

Sig Sauer STR 200 /GRS/Rempel





And here is 50 Eley Match shot right after the 100 Center-X.
Avg Vel 1076 f/s, ES 33 (or 25 if you remove the two extreme values).

 
#78 ·
Winchester Varmint HE 34 grain jhp 22 wmr, rated 2120 fps



CZ 455 Feddersen Fuglie



Inspection before sending downrange showed one scragged cartridge.
Peeled back the copper plate and deformed the bullet.
Also found variations in seating depth and angle, irregular brass dimensions.
Great quality control at Winchester, eh? :rolleyes:



ES 164 fps

 
#79 ·
Winchester Varmint HV 30 grain jhp 22wmr rated 2250 fps



CZ 455 Feddersen Fuglie



This was not a good box of 22wmr.
Roll the cartridges on a flat surface and visible tip wobble.
Uneven seating depths and angles, irregular brass dimensions,
bent cartridge that couldn't be chambered. :(

Plenty of strays in that box.

 
#80 ·
Krob95 is still working at it.

Quote: This time I shot the targets with a Tangent Theta 5-25 Gen2XR
with the dot above the big hole being my point of aim.
Rifle had approx 500rds on it since last cleaning before this. Now it has 650.

Indoor range, 100 yards



Thinking I am going to scrub the barrel and chamber really well,
foul it back in with 20rds or so, then do this one more time.
Adding a bonus brand of ammo to the mix as well for science.
I really want to break 1 moa for a 50rd group at 100yds.
This is quite the challenge for sure!

Black stick-on dots 1 inch diameter for reference

CenterX



Midas+

 
#82 ·
Picked up a Howa 1100 and playing with it the past few days, why not shoot fifty at a hundred. Stock rifle other than trigger spring mod, 1st stage 2oz, 2nd 14oz.
Kit scope Nikko Stirling 3.5-10x44@10x

Prone off bipod, rear bags. Wind 12-17mph swirling between the apple trees at the farm, and of course, rain.
Federal AutoMatch was showing sub moa in better conditions last evening. Not so great today.

1”dot aiming point 1/4” grid on target so roughly 2-1/4” spread.
 

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#84 ·
It ain't easy shooting outdoors, in a shifting breeze, with bulk 22lr,
yet still keep it at 2 moa at 100 yards for fifty shots, W8.
Nicely done.
Thanks jaja, I'm liking this little economy kit gun. It's showing great promise with less than 200 rounds through it. Have shot some 1/4" groups at fifty with it using Eley Match in less than ideal conditions. Can't wait to see what it will do with a higher power scope.
 
#86 · (Edited)
I hear ya' Phil.
I'm hoping we can get some of the benchrest crowd
motivated enough to attempt the challenge with some lot tested ammo.
I still have quite a few flavors of single boxes to work through.
In the mean time, if any of y'all have the time and inclination,
give the 50 at 100 a try. The wider the variety of rifles and ammo,
the better the comparisons will be. Not just 22lr, but 17hm2, hmr and 22wmr.

Think of it this way, ye'r not just shooting some groups and then tossing the target in the can.
Ye'r doing some shooting with a purpose, and a target lifespan that extends beyond
tacking it to the backer and dropping it in the trash. ;)
 
#87 ·
Martini MK V, Hakko 8-40x56 scope, Federal AutoMatch 50@100.
A well worn Martini after spending most of life as a club gun, I removed barrel last night and machined off .100 for a fresh crown. Pretty good lot of cheap ammo showing pretty darn good ES. Wind swirling between the apple trees at 4-7mph, no flags. 1/4” grid on one inch dot sighter.
 

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