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Rifles, Reloading, Optics, Equipment
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Allen Mag Shooters Group
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<blockquote data-quote="royinidaho" data-source="post: 136711" data-attributes="member: 2011"><p><strong>More of learning curve & experience -In the interest of sharing info</strong></p><p></p><p>Received a couple of hundred of the 195WCs. After the experience expressed in the long post, above, I figured I was ready to getter goin'.</p><p></p><p>First I got to looking at all of those terrible lookin 200 yard groups that I had shot with the 195s so far. It was a bit of an eye opener when I measured all of the groups and converted to MOA. As bad as they looked the largest of the groups were just under 1 MOA and there was just a couple of those. Average would hover right around 7 tenths. That isn't too shabby, I'd say. But not good enough.</p><p></p><p>I started the session with fully resized cases that had the shoulders set back only enough to not crunch the case. All resized empty cases chambered as though they weren't even there.</p><p></p><p>I started with 93gr of US-869 and the 195 WC set right on the lands or leade or whatever it's called. To determine that length I let the bolt seat a bullet in a specially altered case mouth. I then set the sizing die to this length. This setting was a little long with the bullet being seated somewhat into the lands. I then colored the ogive area of the bullet with a sharpie and adjusted the seating die until just about 1/2 of the sharpie mark was removed and called this "on the lands".</p><p></p><p>Temp: 16 to 19*F</p><p>Hum: 74 to 68%</p><p>Press: 25.873 to 28.855</p><p>Elevation: 4450'</p><p>Wind was negligible</p><p>Mirage was good for about 3/4" at the 200 yd target. Holey good squat! With snow on the ground and 16* ya figure mirage wouldn't be a problem. /ubbthreads/images/graemlins/frown.gif</p><p></p><p>Loaded 3 93gr of 869 and 3 with 94gr all seated "on the lands" which left only a small mark all the way around the bullet that was "just" noticible.</p><p></p><p>The 3 93gr loads averaged 3048 FPS w/an ES of 21 and went into 1.09 MOA ( noticed one load chambered tightly and it was the shot that opened the group. The other two shots were w/in 0.5" of each other.</p><p></p><p>The 3 94gr loads averaged 3085 w/an ES of 40 and went into 0.764 MOA.(I again noticed that one load chambered tightly and again it was the one that opened the group.)</p><p></p><p>I know it wasn't the case causing the chambering pressure so it must have been the COL making a difference. The next step was to jump the bullet a bit and see what happened.</p><p></p><p>When seating the bullet deeper the velocity goes down so I stuck with 94gr of US-869 and set the seating die for a 10 thou jump. The 3 shots averaged 3067 FPS w/an ES of 25. The first 2 shots were w/in 0.5" of each other. The 3rd shot was high making the group 1.2" or .573 MOA. (Its typical for me that when the first two shot 'go in there' I nearly have an anxiety attack about half way through braking the trigger on the next shot. (That's why I liked a 2 oz trigger) So now I had to determine if I was the problem or it was a "good" flyer. /ubbthreads/images/graemlins/confused.gif</p><p></p><p>I loaded 3 more w/94gr and 10 thou jump and 3 w/a 15 thou jump.</p><p>The 10 thou loads averaged 3078 FPS and went into the same group as the previous identical load for a 0.429 group within the 0.573 group.</p><p></p><p>The 15 thou group averaged 3083 W/an ES of 31, shifted to the right about an inch and was a horizontal banana shaped group of about 0.86 MOA.</p><p></p><p>As Mike and Tim have discovered the 270 AM is sensitive to seating depth which can really be tweeked to do some good shootin. Additionally the ESs have seemed to come down since I've improved my resizing techniques.</p><p></p><p>She's zeroed @ 200, shooting round 1/2 MOA @ 200 w/a velocity that will produce right around 2000 FPE @ 1000 so the next step is to take to the range and do the drop chart thing then put some holes in fur.</p><p></p><p>Just for note, she shoots a bit better from the bipod than she does from the pedestal rest and the bench. At least she did with the 150 BTs and 169.5 WCs.</p></blockquote><p></p>
[QUOTE="royinidaho, post: 136711, member: 2011"] [b]More of learning curve & experience -In the interest of sharing info[/b] Received a couple of hundred of the 195WCs. After the experience expressed in the long post, above, I figured I was ready to getter goin'. First I got to looking at all of those terrible lookin 200 yard groups that I had shot with the 195s so far. It was a bit of an eye opener when I measured all of the groups and converted to MOA. As bad as they looked the largest of the groups were just under 1 MOA and there was just a couple of those. Average would hover right around 7 tenths. That isn't too shabby, I'd say. But not good enough. I started the session with fully resized cases that had the shoulders set back only enough to not crunch the case. All resized empty cases chambered as though they weren't even there. I started with 93gr of US-869 and the 195 WC set right on the lands or leade or whatever it's called. To determine that length I let the bolt seat a bullet in a specially altered case mouth. I then set the sizing die to this length. This setting was a little long with the bullet being seated somewhat into the lands. I then colored the ogive area of the bullet with a sharpie and adjusted the seating die until just about 1/2 of the sharpie mark was removed and called this "on the lands". Temp: 16 to 19*F Hum: 74 to 68% Press: 25.873 to 28.855 Elevation: 4450' Wind was negligible Mirage was good for about 3/4" at the 200 yd target. Holey good squat! With snow on the ground and 16* ya figure mirage wouldn't be a problem. [img]/ubbthreads/images/graemlins/frown.gif[/img] Loaded 3 93gr of 869 and 3 with 94gr all seated "on the lands" which left only a small mark all the way around the bullet that was "just" noticible. The 3 93gr loads averaged 3048 FPS w/an ES of 21 and went into 1.09 MOA ( noticed one load chambered tightly and it was the shot that opened the group. The other two shots were w/in 0.5" of each other. The 3 94gr loads averaged 3085 w/an ES of 40 and went into 0.764 MOA.(I again noticed that one load chambered tightly and again it was the one that opened the group.) I know it wasn't the case causing the chambering pressure so it must have been the COL making a difference. The next step was to jump the bullet a bit and see what happened. When seating the bullet deeper the velocity goes down so I stuck with 94gr of US-869 and set the seating die for a 10 thou jump. The 3 shots averaged 3067 FPS w/an ES of 25. The first 2 shots were w/in 0.5" of each other. The 3rd shot was high making the group 1.2" or .573 MOA. (Its typical for me that when the first two shot 'go in there' I nearly have an anxiety attack about half way through braking the trigger on the next shot. (That's why I liked a 2 oz trigger) So now I had to determine if I was the problem or it was a "good" flyer. [img]/ubbthreads/images/graemlins/confused.gif[/img] I loaded 3 more w/94gr and 10 thou jump and 3 w/a 15 thou jump. The 10 thou loads averaged 3078 FPS and went into the same group as the previous identical load for a 0.429 group within the 0.573 group. The 15 thou group averaged 3083 W/an ES of 31, shifted to the right about an inch and was a horizontal banana shaped group of about 0.86 MOA. As Mike and Tim have discovered the 270 AM is sensitive to seating depth which can really be tweeked to do some good shootin. Additionally the ESs have seemed to come down since I've improved my resizing techniques. She's zeroed @ 200, shooting round 1/2 MOA @ 200 w/a velocity that will produce right around 2000 FPE @ 1000 so the next step is to take to the range and do the drop chart thing then put some holes in fur. Just for note, she shoots a bit better from the bipod than she does from the pedestal rest and the bench. At least she did with the 150 BTs and 169.5 WCs. [/QUOTE]
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