Hi there.
Just wondering how often you guys clean your barrel.
Which do you think is the best way to do so, to avoid unwanted effects on groups?
I shot tested a load yesterday under these conditions:
Distance @ 190 yds. approx.
Light breeze
Outside temperature @ 25 degrees Celsius
High Humidity (80/90%)
Barrel length: 24"
Caliber: 6,5x57 RIMMED
Rifle: Blaser K95 single shot (break open)
Scope: 6x42
Powder: NORMA 204
Primer: Federal GM210
Cases: RWS
Bullet: 120 grs. Nosler BT
Results:
First shot out of a shiny cleaned barrel (maybe not clean enough...) about 3,5" lower and 1" to the right of the remaining group of 4 shots.
Group (4 shots): within 1.5" diameter
Now, for hunting purposes a 1.5" group @ 190 yds. is more than what I need.
On the other side, since the first shot is the one which count the most, why did I get such a different impact point from the others (which impacted in the same place as usual and thus correctly?).
Could it be an excess of solvent or oil still inside the barrel/chamber?
Also, even by swapping bullet make I find big differences...
Appreciate your help.
Cheers.
BTW: My rifle seems to better shoot medium/lighter weight bullets, even though its very long head space would call for heavier ones...
Just wondering how often you guys clean your barrel.
Which do you think is the best way to do so, to avoid unwanted effects on groups?
I shot tested a load yesterday under these conditions:
Distance @ 190 yds. approx.
Light breeze
Outside temperature @ 25 degrees Celsius
High Humidity (80/90%)
Barrel length: 24"
Caliber: 6,5x57 RIMMED
Rifle: Blaser K95 single shot (break open)
Scope: 6x42
Powder: NORMA 204
Primer: Federal GM210
Cases: RWS
Bullet: 120 grs. Nosler BT
Results:
First shot out of a shiny cleaned barrel (maybe not clean enough...) about 3,5" lower and 1" to the right of the remaining group of 4 shots.
Group (4 shots): within 1.5" diameter
Now, for hunting purposes a 1.5" group @ 190 yds. is more than what I need.
On the other side, since the first shot is the one which count the most, why did I get such a different impact point from the others (which impacted in the same place as usual and thus correctly?).
Could it be an excess of solvent or oil still inside the barrel/chamber?
Also, even by swapping bullet make I find big differences...
Appreciate your help.
Cheers.
BTW: My rifle seems to better shoot medium/lighter weight bullets, even though its very long head space would call for heavier ones...