Re: Range Test Mcmillan EOL Outdoorsman
Korhil, If you look back through some of my old tests I was getting 3100's fps with 91.5-92 grains retumbo. Three things changed. I ran out of that lot of retumbo and now working on new loads. Also previous testing was in winter/spring Wyoming weather. This weekend it was 104-107 degrees. Another thing is this rifle gets more velocity with lighter loads than my other RUM's. Also the berger loads were closer to the lands than previous tests. All these combinations will produce different results. I noticed the velocity difference immediately while shooting and was shocked with less powder getting more velocity.
I have two other 300 RUM's and they shoot on average 2+ grains of powder more to get the same velocity and both are 28" barrels. This one is getting the same velocity with less powder and a 26" barrel. Go figure that one. Probably in the Mcmillan chamber and Schneider barrel they used. Maybe they are on to something or like all rifles each are different. Load for the one you have and get it right. Don't worry about what the other guy is getting with his. That is what I learned years ago.
Wildrose, this rifle is the tightest, slickest operating action with the most minimum tolerances I have ever shot but I assure you it does not squeak. Mcmillan went to great lengths with their proprietary coating to insure that it is weather resistant and does not squeak even in the most demanding hunting environments.
Barnesuser, As you seat closer to the lands you will build more pressure and therefore velocity with equal powder charges. Barnes bullets typically do not like to be close to the lands so I don't know if I would change that closer. With heavy bullets like the 280 grain Retumbo should give you more velocity than H-1000. Velocity spread is the key and if you have a super accurate load you are good. A 280 grain at that velocity will get you way out there and kill anything that walks. If you have a 26" barrel you are in the range of where you should hit a good load with the lapua. I have two now and have tested many on my old range at the shop when I was developing and testing several improved designs along with the standard lapua. I think you could increase your powder charge and get more velocity without having to much pressure but accuracy is the key and not how fast you can shoot. 2850 fps would be on the high end and barrels can differ near 200 fps with best loads. Just message me.
Predictions are difficult, especially when they involve the future
Last edited by Long Time Long Ranger; 07-03-2012 at 01:16 AM.