CLICK HERE for $200 INSTANT SAVING - ANSWER THE CHALLENGE!
CLICK HERE for GREAT DEALS on KUIU ULTRALIGHT HUNTING GEAR!

Page 1 of 5 1 2 3 4 5 >
Topic Options
#6195206 - 02/19/12 03:18 PM Help diagnose this group
Pharmseller Online   content
Campfire Ranger

Registered: 01/18/10
Posts: 1741
Loc: Willamette Valley, Oregon
I shot this group today.
7mm-08
120 gr NBT
50.0 gr Ramshot Big Game
CCI 200 primers
Remington brass
Loaded 0.015" off the lands.
100 yards



The fifth shot was from a bit of a warm barrel, but as you can see I'm stumped as to why I'm getting shots touching close to 2 inches apart.

A previous 3 shot group has the same pattern, with two shots touching and a third 0.53" out.

What should I try to tighten the group?


P
_________________________
We are determined that before the sun sets on this terrible struggle, our flag will be recognized throughout the world as a symbol of freedom on the one hand, of overwhelming power on the other.
General George C. Marshall, 1942

Member #547

Top
#6195226 - 02/19/12 03:23 PM Re: Help diagnose this group [Re: Pharmseller]
mcmurphrjk Offline
Campfire Guide

Registered: 03/04/08
Posts: 3195
Loc: Northern Nevada
Scope good?
_________________________
Democracy is not freedom. Democracy is two wolves and a lamb voting on what to eat for lunch. Freedom comes from the recognition of certain rights which may not be taken, not even by a 99% vote.
*Marvin Simkin* L.A. Times (1992)

Top
#6195400 - 02/19/12 04:07 PM Re: Help diagnose this group [Re: mcmurphrjk]
SodFarmer Offline
Member

Registered: 01/14/03
Posts: 61
Loc: Iowa
I would shoot a few more groups with different charges and powders to see if you get a better result. I had a similar experience with one of my rifles and I could not find a powder or a charge that would work. In the end, I switched bullets to a different brand and the problem went away. It could be that your barrel doesn't like that particular bullet.

Top
#6195412 - 02/19/12 04:10 PM Re: Help diagnose this group [Re: SodFarmer]
rifle Offline
Campfire Tracker

Registered: 01/31/06
Posts: 5413
Loc: now in SC
What kind of rifle?bedded? scope? good rest? details...
_________________________
Come on America,
Athletes and actors are not heroes, only soldiers, airmen,marines and sailors get that respect…and let's add firemen and LEO's





Top
#6195504 - 02/19/12 04:26 PM Re: Help diagnose this group [Re: rifle]
mjbgalt Offline
Campfire Tracker

Registered: 01/28/08
Posts: 6083
Loc: ohio
how good was your rest? if you don't have a consistent rest you'll string them like that. use a bag under the buttstock also.
_________________________
I put Varget on my cornflakes...

inventor of Fart Lok scent control clothing.


THIS IS NOT DRESS REHEARSAL

Top
#6195547 - 02/19/12 04:37 PM Re: Help diagnose this group [Re: mjbgalt]
dye7barrel Offline
Campfire Ranger

Registered: 04/08/08
Posts: 1701
Loc: Washington
Barrel freedloated? Keep the info coming.

Top
#6195642 - 02/19/12 05:01 PM Re: Help diagnose this group [Re: dye7barrel]
Pharmseller Online   content
Campfire Ranger

Registered: 01/18/10
Posts: 1741
Loc: Willamette Valley, Oregon
Good rest. Sandbags fore and aft.
Scope - Minox ZA3, Talley lightweight mounts. All screws tight.
Rifle: Weatherby Ultra Lightweight.
Not bedded.
Ultra Lightweights are supposed to like a little upward pressure on the barrel.
Not freefloated.
Fired at 6X.

What bothers me is the consistency of the inconsistency. If the scope or mounts were bad I would expect more variance.

Here's the 3 shot group I fired before the 5 shot group. This group measures 0.93" center to center. After I fired this group I let the barrel cool then adjusted the scope 10 clicks up and 3 clicks left.



P
_________________________
We are determined that before the sun sets on this terrible struggle, our flag will be recognized throughout the world as a symbol of freedom on the one hand, of overwhelming power on the other.
General George C. Marshall, 1942

Member #547

Top
#6195791 - 02/19/12 05:37 PM Re: Help diagnose this group [Re: Pharmseller]
Tanner Offline
Campfire Outfitter

Registered: 02/28/11
Posts: 9760
Loc: High Country Colorado
Something you'll hear over and over again about "2 in, 1 out" type groups is to try seating in a little deeper. Lots of guys have seen groups shrink and become nice tight little triangles or clusters with that method.

Top
#6195807 - 02/19/12 05:40 PM Re: Help diagnose this group [Re: Pharmseller]
Ackleyfan Offline
Campfire Tracker

Registered: 03/10/02
Posts: 5867
Base screws that are tight don't mean the bases are tight, Bases should be installed 1 screw at a time to make sure the bases are being held tight by both screws!

Top
#6196098 - 02/19/12 06:43 PM Re: Help diagnose this group [Re: Ackleyfan]
Pharmseller Online   content
Campfire Ranger

Registered: 01/18/10
Posts: 1741
Loc: Willamette Valley, Oregon
Originally Posted By: Ackleyfan
Base screws that are tight don't mean the bases are tight, Bases should be installed 1 screw at a time to make sure the bases are being held tight by both screws!


I'm trying to visualize what you mean and it just isn't happening.

P
_________________________
We are determined that before the sun sets on this terrible struggle, our flag will be recognized throughout the world as a symbol of freedom on the one hand, of overwhelming power on the other.
General George C. Marshall, 1942

Member #547

Top
Page 1 of 5 1 2 3 4 5 >


Moderator:  RickBin, SYSOP 
Support Our Sponsors 1
Who's Online
171 registered (2ndwind, 44automag, 270winchester, 19Scott63, 257_X_50, 07blackwater, 23 invisible), 1070 Guests and 327 Spiders online.
Key: Admin, Global Mod, Mod
Support Our Sponsors 2
Forum Stats
50166 Members
72 Forums
627637 Topics
8995917 Posts

Max Online: 4366 @ 10/05/10 09:36 AM
Support Our Sponsors 3









Copyright © 2000-2013 24hourcampfire.com, Inc. All Rights Reserved.