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Reloading Techniques For Reloading


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300 RUM Issues...

 
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  #29  
Old 04-25-2013, 12:39 PM
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Re: 300 RUM Issues...

what you are pointing appears to be marking left from a rough bolt face. as for increasing your load 2gr. in 1 step i would try 1gr. and then .5gr increments from there.
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  #30  
Old 04-25-2013, 12:45 PM
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Location: Colorado
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Re: 300 RUM Issues...

Quote:
Originally Posted by MR.SWIFT View Post
what you are pointing appears to be marking left from a rough bolt face. as for increasing your load 2gr. in 1 step i would try 1gr. and then .5gr increments from there.
The only reason I think it's a pressure sign is that it doesn't show up on every round and seems to disappear if I drop the load down. If I do step up the load, I obviously would only do .5gr increments. I was just asking if it would be realistic to get a huge jump in speed with only a couple extra grains.
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  #31  
Old 04-25-2013, 06:06 PM
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Re: 300 RUM Issues...

each time you ck for the marking are you using new brass.
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  #32  
Old 04-25-2013, 06:12 PM
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Re: 300 RUM Issues...

Yes, all rounds have been with new brass so far.
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  #33  
Old 04-25-2013, 06:52 PM
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Re: 300 RUM Issues...

as one gentleman said find a chony and verify speed. or change powder and ck for similar results. i dont as a rule load just for velocity. i will watch for pressure signs and shoot for my best group. sometimes alot of powder is burned prior to finding the group that i am happy with. and yes i own a chronogragh. my 300rum is becoming a 7mm/300wm, much better round
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  #34  
Old 04-25-2013, 10:13 PM
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Location: Worland, Wyoming
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Re: 300 RUM Issues...

As someone else stated, I don't think you are seeing pressure signs. The markings on the brass seem to be from a poorly machined bolt face, (easily repaired) on all my ultra mags, high pressure is evidenced by a round circle from the ejector imprinted into the case head and notably loose primer pockets when reloading. In my opinion you have a ways to go. If your gun has a long throat, you could need some more powder to over come it. With a factory remington 700 you should be able to load you oal close to 3.670 as a max. This will get you closer to the lands and reduce pressure further allowing for more powder. Have you checked the accuracy of your powder scale?
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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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  #35  
Old 04-25-2013, 10:26 PM
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Re: 300 RUM Issues...

I don't want to go any longer than my current loads because otherwise they won't fit the magazine. I haven't checked the accuracy of my scale, but I will do that as well. Thanks for the advice!
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