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> soot on neck why
soot on neck why
@ 07:02 pm (GMT) |
robert meiklehi all getting soot on the neck off cases. now load is close to maximum in my 7mm rem mag so whats going on. why soot on the base off the neck I full length size cases thanks |
Replies
@ 07:14 pm (GMT) |
chris murphyRe: soot on neck whydo you use a suppressor and are they new brass (unfired)? |
@ 07:16 pm (GMT) |
Bob MavinRe: soot on neck whyHi RobertIt’s OK, I get soot on my necks too. Some powders burn a bit cleaner than others. My 30-06 always gets sooty necks. Bob |
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@ 09:11 pm (GMT) |
robert meikleRe: soot on neck whyyes use silencer t8, brass is not new Remington manufactured . powder is h1000 69g used with a162g amax magnum primers no primer or case problems chamber good |
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@ 09:20 pm (GMT) |
chris murphyRe: soot on neck whythe suppressor will cause a lot of carbon to stay in the bore. i got a lot on my 7mm rm with a suppressor but a lot less with a break. it not to much to worry about just be sure to clean rifle after firing and never store with suppressor on as per Nathans 3rd book. |
@ 11:12 pm (GMT) |
Nathan FosterRe: soot on neck whyHmmm. OK, there is a bit to this. Many 7mm Rem Mags hit max at around 73.5 to 74 grains with case damage at 74 to 74.5 grains. The manuals play it safe for several good reasons, the first being throat length which varies from rifle to rifle. But, add to this a suppressor that depending on the design may trap a great deal of heat, a skinny barrel that is a poor heat sink, then add carbon blow back and carbon caking in the chamber and what is now a possibly mild load at 69 grains, will become a high pressure load as the case neck area of the chamber reduces diameter under carbon caking until eventually, the bullet is being pinched in place and reaching maximum pressures no matter how mild the load.So- it could be that your loads are extremely mild. But the one given is that carbon is caking in the neck area of the chamber. In either case, you need to scrub that chamber neck area with an over sized bronze brush and solvent after each shooting session. As mentioned, this is all covered in the book series. |
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@ 03:23 pm (GMT) |
robert meikleRe: soot on neck whythanks nathan gun is Remington 700 police I will give it a good scrub and try more powder. gun shows no signs of pressure at 69g not even flat primers cases all look good. I was just going by the book max and did not want to go to far with the load. but if you think im not getting the best from the gun il try working up the load all advice gratefully recived thanks |
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@ 12:30 am (GMT) |
Nathan FosterRe: soot on neck whyHi Robert, just keep in mind that I have no idea what is max for your rifle without seeing it first hand for myself and measuring the throat for myself. Just be careful with what I have said. Yes, read the primers etc, very good. |
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