Back To Top
Join Date: Apr 2004
Location: centre county, Penns Valley 4D
I installed a Timney trigger in my 243 vanguard few years ago. The stock trigger wouldn't fire in the fire position. I adjusted the trigger pull to 3 lbs. I closed the bolt of course no loaded round in the chamber. Just a spent casing. Bounced the butt stock off the floor 6"-8" just to be sure it did not trigger the firing pin. Then I lapped the scope rings. After lapping several times, I was surprised how much of the Leupold rings were gripping the scope, want much but it took some effort to get the rings true. Much better groups.
The Browning X bolt 223 when I 1st got it few years ago. I tested the best load for the 65 grain sierra gameking bullets. varget powder did the best. 25.5 grains. Target out to 102 yards. Anyways I forgot to lap the scope rings. I did that in a day or two. Back out to the field, sight of impact want much difference, maybe a click high, click or 2 to the left etc. Better groupings though.
All 223 reloads were with Winchester brass. I decided 1 day to purchase Lapua brass. I loaded them up same exact with Varget powder weight, primer & bullets. I didn't do anything, did not touch the trigger pull, nor scope adjustment. After several rounds down the barrel my groups were tighter. Went from dime size groups to half size of the dime with Lapua brass.
Anyways was it a fluke using Lapua brass? I loaded the 2nd best groups which was CFE-223 25 grains with Sierra gameking 65 grain. I got the same results with the Varget rounds. I believe the c.o.a.l. was at 2240" with these rounds. The sierra manual has 2250". Touching the lands they were so I backed them down to 2240.
Just for fun. I fired these rounds with Lapua brass out of my Colt to see what groups I get. What the? Wow I was impressed, but I cannot afford to loose casing's firing them out of the Colt m-4. I even took a tarp to lay down on the ground to see the casings alot easier then rooting through the grass. I still lost a few rolling off the tarp could not find them in the grass field. I'll stick with winchester brass for the AR hunting groundhogs, with a ball cap catching the brass, sometimes I loose 1 here and there. Groups are ok with winchester brass I can live with. Lapua brass groups got tighter, not as good out of a bolt action now.
Good luck to you, happy shooting.