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Range Test Mcmillan EOL Outdoorsman

 
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  #71  
Old 07-02-2012, 11:25 PM
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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.
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Last edited by Long Time Long Ranger; 07-03-2012 at 01:16 AM.
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  #72  
Old 07-02-2012, 11:50 PM
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Re: Range Test Mcmillan EOL Outdoorsman

The "squeak" was euphamistic for extremely tight tolerances all the way around.
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  #73  
Old 07-02-2012, 11:55 PM
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Re: Range Test Mcmillan EOL Outdoorsman

Wildrose, I didn't mean anything by that. please don't take it the wrong way. I was just being sarcastic about the squeak.
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  #74  
Old 07-03-2012, 12:59 AM
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Re: Range Test Mcmillan EOL Outdoorsman

Quote:
Originally Posted by Long Time Long Ranger View Post
Wildrose, I didn't mean anything by that. please don't take it the wrong way. I was just being sarcastic about the squeak.
I didn't. I know how pleased you are with this rifle and we're all enjoying reading along as you test it.

Maybe they'll forget where they dropped it off.... .
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  #75  
Old 07-03-2012, 04:02 AM
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Re: Range Test Mcmillan EOL Outdoorsman

I wasn't being sarcastic at you either LTLR. That is just crazy fast.
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  #76  
Old 07-03-2012, 10:28 AM
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Re: Range Test Mcmillan EOL Outdoorsman

Quote:
Originally Posted by WildRose View Post
I didn't. I know how pleased you are with this rifle and we're all enjoying reading along as you test it.

Maybe they'll forget where they dropped it off.... .
I think that many of us are hoping that the rifle will go on a "round the US tour."
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  #77  
Old 07-03-2012, 11:31 AM
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Re: Range Test Mcmillan EOL Outdoorsman

Korhil78, H-1000 and Retumbo can vary quite a bit lot to lot from what I have found. I would suggest to anyone buy this powder in bulk or risk changing your loads with each batch. My H-1000 loads are down three grains from my data in the late 90's. The past three years or so it seems each lot can vary a couple grains. I have used Hodgdon's H870 since the 60s and it can easily vary 3-4 grains batch to batch. That is why when I buy powder I buy in bulk from the same lot number. Sometimes I get a batch of powder that shoots incredible and I am sick when I run out of it.

All rifles have peculiarities and one I have found with this rifle I mentioned was max loads typically run about two grains less powder than my other 300 RUM's. However it gets the same velocity with a 26" barrel I am getting with my 28" barrel rifles. At first it was interesting but I wanted more testing to see if it was an anomaly. Now I have shot many rounds and loads through this rifle and this tendancy has continued. At this point I can say from enough testing this rifle will shoot equal to my 28" barrels with about two grains less powder. Maybe it is in the EOL reamer or just a quirk of this particular rifle. But that is what my data shows.The throat is shorter than my other 300 RUM's which is a factor but I would not have thought that much a factor. Then the Schneider polygon barrel could have something to do with velocity compared to my 28" barrels which are Hart and Pac-Nor 1-10 twist. This is the first Schneider I have ever shot.
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