by admin | Feb 1, 2011 | F Class, Gallery, Load Tuning, Rifle, Tech
Oct 16, 2009 This is a very common question I get asked. The short answer is VERY WELL and it really depends on the quality of barrel used and the precision of the chamber cut. I just received a new Shilen SS Select match barrel prethreaded and chambered for the Savage action in 260AI. I put this into an older Savage action that used to be my 7RM LR hunting rig. Into my BR style thumbhole stock and off to the range. Below is a picture of the test groups I shot today with new, almost fireformed Win brass, Lapua 139gr Scenars, H4831SC, CCI BR2 primers. Conditions were near ideal with next to no wind, overcast, cool but damp (just rained). [almost fireformed brass – this brass was formed using a light charge of pistol powder and cornmeal and has the shoulder about 90% formed (still rounded shoulder). The first smokeless load performs the final forming and gives the case a nice sharp shoulder] After the first 6 shots to try and sight in the rifle, I found that the scope ring shims (Burris Sig Zee rings) were way off and I was shooting way too high. I forgot my extra shims so had to make do. Was able to get the POI on the target but still over 1ft high at 100yds. All testing was done at 100yds because I couldn’t keep on target at 200yds – POI way too high. A couple more shots and I was near the target and had run out of sighting in ammo so I had to use my first test load....
by admin | Feb 1, 2011 | F Class, Load Tuning, Powder and Primer, Reloading, Tech
In this Article, I walk you through the steps to quickly and consistently get your rifle shooting its best in the fewest number of rds. This Method has worked well for me over the last decade on dozens of rifles in cartridges from the 223 to the 300RUM. Simple, effective and saves alot of wear and tear on your new rig and your wallet. The GOAL – produce the most accurate load with no vertical dispersion at 200yds and beyond. The two pics below show what the same rifle will do with a very small change in powder charge. Both group sizes are very similar but one load has no vertical, the other all vertical – both shot at 200yds. At LR, the vertical load will fall apart Enjoy.. Jerry Load Tuning to Maximize LR...
