Range Report help with 22ballistics

[maccrazy2]

I got out and did some testing with my rem 40x this weekend. I tried out the norma tac22 ammo. It shoots really well in this rifle. I zeroed at 50 yds. shot at 100 and 200. I ran the scope up and down several times to test tracking while doing this to verify return to zero and return to same evevation at range. I also chrono'd using the magneto speed prior to shooting the groups so it was not attached when gathering dope.
50yd=zero, 100yd=4.125moa, 200yd=19.125moa. this is on a mueller 8-32x40 scope.
temp 70deg, D.A. 7000, velocity 1130fps, 40gr bullet, bullet BC guestimate .134 from rimfire central. I run it thru jbm ballistics and am way off. I have tried varing altitude, bc, velocity and am still not close.
Can someone spot what I am missing.

also shot blazer 22lr while there. 1249fps, 40gr, 100yd=2.625moa, 200yd=16.375moa, zero was not changed from norma ammo. the blazer hit about .500 higher at 50yds than the norma
magneto speed was set to rimfire settings before chronoing
i am in colorado shooting at the CRC range. I dont know the actual elevation there but DA was in the 6900-7100 range when shooting these groups

 

[40xs]

Considering the elevation above sea level that you are shooting it looks as if you are getting the proper feedback. I'm only at about 700 ' above sea level and my dope with wolf match extra is 50yd. 0, 100 yd- 6.5 moa and 200 yd- 26-27 moa. This ammo is subsonic as well.

 

[maccrazy2]

I am entering something wrong in jbm. It gives me data more like your trajectory for the Norma ammo.
It has always worked well for my 260, 308, 338. I am not sure why I am so far off for the 22

 

[maccrazy2]

Oops. I meant to copy and paste my data from jbm on the original post.
The Norma ammo was something like 6.5moa at 100 and 22moa at 200
I tried varying the velocity, BC, elevation and could not get the numbers close to the actual dope of the rifle

 

[BC 6.8]

It is possible that the clicks on your scope aren't true 1/4". I have a Vortex Viper scope on my CZ .22, and I can't get JBM to match my come ups perfectly either. I would suggest zeroing your scope at 100yds then rezero at 200 yds. Come back to 100 yd without dialing down the scope and shoot a group. Measure the distance between your first 100 yd group and the second 100 yd group to see how much your scope clicks are actually moving.

 

[40xs]

Ballistics programs are comprehensive, however, nothing beats actual field experimentation to a specific weapon and/or location and elevation. those apps. are somewhat akin to bore sighting. It gets you close, but not absolute.

 

[Tempest 455]

I shoot .22LR often and at longer distances as well, 300 yards at our range. I also have chrono'd a bunch of different ammo using a Magnetospeed and have pretty consistent results. I have checked the dope of what I need to get to 300 and compared with the data on JBM.

Based on testing this a bunch of times, .13 is pretty optimistic for a BC. I'm guessing 1.1 is probably more in the ballpark.

 

[maccrazy2]

A little more info. The scope has 1/8 moa devisions on the turrets. I have not had a chance to verify the retical tracks true but I will try to do that this weekend. I will swap scopes with my Schmidt if needed to verify tracking accuracy.
I did run the turrets all over the place and it seems to track and return to zero ok but I did not yet check to make sure it is moving the correct amount

 

[Tempest 455]

I typically shoot Blazer at longer distance as well. Here is some more chrono data FYI:

CCI Blazer suppressed: (did not effect velocity on average)

Avg 1229

ES 54

2 1 1223 ft/sec
2 2 1218 ft/sec
2 3 1250 ft/sec
2 4 1237 ft/sec
2 5 1196 ft/sec
2 6 1246 ft/sec
2 7 1234 ft/sec

Eley Match:

1060
1071
1041 Avg 1060 / ES 30
1062
1067

Lapua Center X:

1077
1071
1060 Avg 1062 / ES 25 (Note * My TRR shot most accurate group at 100 yards so far w/ this ammo)
1053
1032

CCI SV:

1046
1040
1049 Avg 1047 / ES 22
1039
1061

Federal bulk HV:

1233
1233
1257 Avg 1241 / ES 24
1238
1245


CCI Blazer:

1238
1220
1236 Avg 1230 / ES 25 (These were in a box I typically sort weighed rounds. I forget if I did or not)
1216
1241

Remington Thunderbolt:

1198
1138
1213 Avg 1184 / ES 94 (Very dirty and cheap)
1143
1232

CCI Mini Mag:

1260
1243
1242 Avg 1256 / ES 32
1262
1274

Centurion:

1236
1222
1242 Avg 1242 / ES 52
1240
1274


*********************************************************************

Different day:


CCI Stinger:

Avg 1483 (high 1502)
SD 13
ES 38

CCI Velocitor:

Avg 1276 (high 1313)
SD 31
ES 73

CCI Mini Mag:

Avg 1251
SD 15
ES 52

RWS HV Match:

Avg 1205
SD 25
ES 69

Federal HV 36:

Avg 1228
SD 14
ES 34

 

[maccrazy2]

Thanks for the info. Blazer averaged 1249fps on a 65deg day at pueblo.

 

[Prebanpaul]

I had the same problem with a vortex scope and a Volquartsen in 22 magnum. I was getting close on the elevation but not perfect. I then read an article on here about entering the proper scope to bore axis in the APP> As stupid as it was I had mine at 1.5 inches which was the generic designation. Once I measured it properly and put In the actual 2 inch vertical the app worked perfect. Try that.