Recent content by Andrew Cowling

Not a good idea to add moisture. You will end up with the same issue when it dries out again.

I would stronly disgree with your statement that the 6.5 creedmoor is better than a 260 Remington. My 260 Remington builds regularly out perform any 6.5 Needmore.

Hi. Most informative write up mate. Here in Tasmania, Australia most people dont care for running barrels in but I do, big time. When I build a rifle for a client the costs include the first five running in rounds. I find these to be the utmost critical rounds to fire so as to insue the rifle...

I have done some extensive testing on various barrels using Boretech C4 carbon remover. Using a bore scope to monitor progress. Quite frankly, I have found the carbon remover to be lacking and a waste of money. The best bang for buck that removed a lot more carbon was scrubing with CRC Brake...

I keep getting asked why I copied wetherby witj my cartrges when 22 years ago I designed and built a 7mm, 308 and 338 AC MAGNUMS. All of these are a rebated rim 3006 bolt face. I used 300 win mag brass and turned the belt off and Rims down and pushed the shoulder back to give a longer neck. I...

Hornady are wrong. I use these 88gr eldm's in my regular 223 Rem with a 28 inch 7 twist barrel. Not blowing apart and very well stabilsed at an average velocity of 2820 fps. I am in the process of building 1 ×22-250AI and 2 × 22 creedmore's which all 3 will run an 8 twist barrel which is more...

Your action is a long action not a magnum action. They only made a short run of the true magnum action in the like of the 416 rigby.

Your action is a long action not a magnum action mate.

Hate to say it but some people need to pulled kicking and screaming into the modern world of the metric system. Milradian is very easy to use in metric. 1 mi is 10 centimeters at 100 meters. 20 centimetres at 200 meters and so on. Of if you like 1/10th mil, 1 click, is 10 millimetres at 100...

One of the biggest issue with the 243 Winchester is the SAAMI reamer specifications call for a rather loose throat of .246 instead of a .244 . If you are going to have a custom barrel fitted I would ask for a longer tighter throat as it does seem to improve accuracy.

I have not long done several barrels for a Savage striker. Finished at 15 inches plus a brake. Man those thing barked but laser accurate.

I respectfully disagree. I have done the same testing and have come to the same conclusion. Barrel harmonics can change bullet speed. I have a 96 swede in 6.5x55 with a 24 inch stainless barrel in a heavy 96 profile and a 3 port muzzle brake with 308 holes. I did my OCW test and found a sweet...

Why waste bullets and barrel life? Use the cream of wheat method and pack the top with tissue paper. Here in Tasmania I could find cream of wheat so I blended up some rolled oats. Worked perfectly once I find the optimim charge weight. Doing it this way you fireform the cases, harden up the...

I call BS on the cause of the damage using a copper/bronze brush. Even with an abrasive the brush will wear out way before the barrel will. It may be possible if a stainless steel brush was used but even then I would be expectong to see corresponding damage of some degree in the grooves.

I clean my barrel every time I use them to maintain their long range accuracy. I use a copper/bronze brush with ballitol to remove powder and carbon fouling then patch out dry. Then I will use the nylon brush soaked in sweets 7.62 solvent to completely saturate the bore to remove the copper...