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How Well To Prechambered Barrels Shoot?

by | 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....
Load Tuning to Maximize LR Accuracy

Load Tuning to Maximize LR Accuracy

by | 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...
Shooting a 223 Accurately to a Mile

Shooting a 223 Accurately to a Mile

by | Feb 1, 2011 | Bullet Seating, Gallery, Rifle, Tech

“Can’t be done” – That was pretty much how this topic was summed up by many shooters.  So, I just had to find out for myself.  If you are interested in pushing the ballistic limits of your rifle and bullet, I think you will find this article worth reading. It has a very happy ending. Enjoy… Jerry Shooting a 223 Accurately to 1...
Precision Reloading for the M1A/M305

Precision Reloading for the M1A/M305

by | Jan 31, 2011 | Case Prep, Gallery, Reloading, Rifle, Tech

Trying to get the most accuracy out of your M1A/M305 or other semi auto rifle?  I cover the history, theory and steps you can take to squeeze the most out these rifles.  After proper rifle tuning and bedding, my Norinco M305’s shot MOA or better and stayed accurate enough to hit clay pigeons at over 500yds. As an update to this article, I would strongly recommend the use of a Redding Body die to bump the shoulders after each firing.  This ensures the cases will chamber properly and eliminates the need to chamber check the rifle after each firing.  A huge time saver and increases safety. I have successfully used these methods on my Norc M4 and Ruger Target Mini14 in 223. Enjoy… Jerry Precision Reloading for the...