What a great morning at the range.....
Sept 28, 2010 18:48:56 GMT -5
Post by Richard on Sept 28, 2010 18:48:56 GMT -5
Since our club was being taken over by area high school athletes doing a "cross country run" on our property, we had to shut the range down by noon. That meant getting up before the crack of dawn and down to the range before daylight. (I got there at 5:55 a.m. and thought I would beat Bill??? Not a chance ;D As soon as I opened the gate, I could see his fresh tracks 
The below listed "stuff" is just that..................Loads I dream up for various reasons to try and just see what works! (Like that load Herman is burning up the 300 yard targets with)
I started the day with a slight variation of that great load. (17/56----N-110/N-130 and a 200 gr. SST with blue Harvester sabot) What I did was to change the N-130 to N-133 being my new barrel is three inches longer than the old one............and hoping the slower powder would deliver either better accuracy or more velocity. The accuracy was pretty good, but the velocity was slower. I may have to up the main charge by a couple of grains. The thing is, N-130 is not readily available..........similar to N-120. I know N-133 is plentiful since it is the preferred powder used by the short range benchrest crowd.
So, I had exactly 15 duplex shots prepared. I started my 100 yard group without any foulers. As it turned out, I could have used one as it showed in that group. Two weeks ago when I used no foulers as per Edge's suggestion, the first shot went into the group? Go figure? Three weeks ago, it did not%$#@^!
Be that as it may, I dialed in three inches of elevation and went right to 300 yards. I used my first stadia line for aiming and put together what should have been a sub 2" five shot group. When I fired the third shot? I just know I moved off the dot to the right just a teeny bit
and that made it a 3.5" group! Oh, well ;D
Next I wanted to try a group with the Barnes 195...................NOT GOOD! On the first shot I blew a sabot (2300 fps as compared to 2900+ fps) The bullet landed 56 inches to the right on Bill's target!
With four shots left, I used the 200 XTP. Strange, my first shot went some 7" low and to the left, then the next three went 12" low and to the right but formed a decent 2.6" group?
In effect, when using the 200 SST sighted 3" high at 100 yards and then using the first stadia line (which subtends two inches between the crosshair and the line at 100) I am technically sighting in 5" high at 100 and being just about dead on at 300 yards.
What I have noticed is that I seem to get much lower Extreme Spreads at the higher velocities.
The remaining loads with pictures are self explanatory.
In the event anyone is wondering, that .363" five shot group was shot with my 600 yrd bench rifle chambered in 6mmBRX .....which is what I have chambered Herman and Bill's rifles. It is a 6mmBR that has the shoulder blown .100" forward and the neck shortened by the same amount. It gives greater powder capacity.
Richard
The below listed "stuff" is just that..................Loads I dream up for various reasons to try and just see what works! (Like that load Herman is burning up the 300 yard targets with)
I started the day with a slight variation of that great load. (17/56----N-110/N-130 and a 200 gr. SST with blue Harvester sabot) What I did was to change the N-130 to N-133 being my new barrel is three inches longer than the old one............and hoping the slower powder would deliver either better accuracy or more velocity. The accuracy was pretty good, but the velocity was slower. I may have to up the main charge by a couple of grains. The thing is, N-130 is not readily available..........similar to N-120. I know N-133 is plentiful since it is the preferred powder used by the short range benchrest crowd.
So, I had exactly 15 duplex shots prepared. I started my 100 yard group without any foulers. As it turned out, I could have used one as it showed in that group. Two weeks ago when I used no foulers as per Edge's suggestion, the first shot went into the group? Go figure? Three weeks ago, it did not%$#@^!
Be that as it may, I dialed in three inches of elevation and went right to 300 yards. I used my first stadia line for aiming and put together what should have been a sub 2" five shot group. When I fired the third shot? I just know I moved off the dot to the right just a teeny bit
and that made it a 3.5" group! Oh, well ;DNext I wanted to try a group with the Barnes 195...................NOT GOOD! On the first shot I blew a sabot (2300 fps as compared to 2900+ fps) The bullet landed 56 inches to the right on Bill's target!
With four shots left, I used the 200 XTP. Strange, my first shot went some 7" low and to the left, then the next three went 12" low and to the right but formed a decent 2.6" group?
In effect, when using the 200 SST sighted 3" high at 100 yards and then using the first stadia line (which subtends two inches between the crosshair and the line at 100) I am technically sighting in 5" high at 100 and being just about dead on at 300 yards.
What I have noticed is that I seem to get much lower Extreme Spreads at the higher velocities.
The remaining loads with pictures are self explanatory.
In the event anyone is wondering, that .363" five shot group was shot with my 600 yrd bench rifle chambered in 6mmBRX .....which is what I have chambered Herman and Bill's rifles. It is a 6mmBR that has the shoulder blown .100" forward and the neck shortened by the same amount. It gives greater powder capacity.
Richard
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