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Reloading Techniques For Reloading


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300 RUM Issues...

 
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  #8  
Old 04-22-2013, 05:58 PM
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Join Date: Oct 2011
Posts: 155
Re: 300 RUM Issues...

There are differences. Not sure what the BC of the AccuBond is. But the Berger is .696 I believe with not a lot of bearing surface. My COAL is 3.843" and my friends is 3.9xx. Can't remember exactly. Every gun is different, and so is every barrel. How far off the lands are you? I am 50 thou off and my friend is 22 thou off.
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  #9  
Old 04-22-2013, 06:03 PM
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Join Date: Oct 2012
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Re: 300 RUM Issues...

I meant a big difference from what I was seeing at what 3,000 fps provides in mine, but yeah I know there will be differences in your loads as well. I am not sure how far off of the lands I am in mine, haven't checked.
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  #10  
Old 04-22-2013, 06:32 PM
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Location: Worland, Wyoming
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Re: 300 RUM Issues...

Cohunter14,

I ran your numbers and your calculations seem correct. I came up with 12.75 moa @ 700 and 20moa @ 900 using 2860 and a 231 yard Zero which exbal says is 2 inches high at 100. Can you seat your bullets a little longer and still fit the magazine? By extending the bullet, you create more case capacity and thus reduce pressure, so you would have to add more powder. It could be possible that you have a tight barrel. How are your velocities with other bullets?
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Remington model 700 300 RUM LH 26" rem ss/blued receiver lam stock 215 Berger @3025/180 NAB @3300
Remington model 700 338 RUM LH 27" Broughton 5C 225NAB@3300 /300gr Berger@2830
Savage LH 22-250
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  #11  
Old 04-22-2013, 06:52 PM
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Join Date: Oct 2012
Location: Colorado
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Re: 300 RUM Issues...

There is not much at all left as far as length goes to fit the magazine. This is the first bullet I have loaded in this gun, so I cannot really judge the velocity difference. One of the things I am contemplating would be to try loading up another bullet (maybe 215 hybrids, although I am not sure how well they would work with my short case length). The other would be to try another powder like RL-25 or H1000, but it seems like everyone gets better velocity than I am getting out of Retumbo, so I wanted to make sure I wasn't doing something wrong first.
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  #12  
Old 04-22-2013, 07:09 PM
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Join Date: Oct 2011
Posts: 155
Re: 300 RUM Issues...

I just shoot mine as a single shot. Lots of time for a follow up shot if you need it. Might want to try some R33. Supposed to work good. Being in Canada I probably won't see any for about a year!
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  #13  
Old 04-22-2013, 07:17 PM
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Join Date: Oct 2012
Location: Colorado
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Re: 300 RUM Issues...

I want to keep the rounds so they can fit in the magazine as I use this for all hunting, long range and short range.

The only two things I have come up with as a possibility for the low velocity at this point is my scope being off or my powder being bad. But my scope would have to be almost an inch low at 100 yards to get anywhere close to 3,000 fps, so that would be a pretty drastic change from when I sighted it in. Either that or the scope doesn't track correct, but it seems like the differences in clicks between 700 and 900 yards match up pretty close. And if the powder was bad, I wouldn't think I would see pressure signs... Thoughts?
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  #14  
Old 04-22-2013, 07:27 PM
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Join Date: Apr 2010
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Re: 300 RUM Issues...

If you've got access to a chrono I'd double check your velocities with that. What kind of tempuratures are you shooting in? What do the primers look like? Have you tried different primers?
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