i just got in to reloading and i started with the 300 remington ultra mag. the brass that i am using is factory loaded brass that has been shot one time. i resized the brass and noticed that one of the rounds would not fit into the shell holder with out considerable force and when i primed that round the primer would just fall out. the primer pocket must have swollen due to the pressures of the round but i am not sure. while i was seating the bullets another round had the same problem and the primer fell out. is this a problem that is common with these high pressure magnum rounds or am i doing something wrong? i have never heard of this issue and it makes me nervous to shoot any of my reloads. i also was wanting to know if anybody has reloaded this round, how many shots do you get out of a piece of brass before you trash it?
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reloading 300 remington ultra mag
- Thread starter jjrevans1
- Start date
Re: reloading 300 remington ultra mag
Your thought process is correct. The loads are pretty hot and are causing the case heads to swell when fired. Remington brass gets loose primer pockets with hot loads. If you keep the loads tame, they will last longer. What's you load data and which bullet are you running? And do you know your velocity?
The next option would be to get a case head die to shrink it back to size. But they are not cheap.
Your thought process is correct. The loads are pretty hot and are causing the case heads to swell when fired. Remington brass gets loose primer pockets with hot loads. If you keep the loads tame, they will last longer. What's you load data and which bullet are you running? And do you know your velocity?
The next option would be to get a case head die to shrink it back to size. But they are not cheap.
Re: reloading 300 remington ultra mag
The brass is essentially scrap weight material now.
If it's only been fired one time in a factory rifle I'd suspect that you have a chamber and/or headspace issue.
Loading them really HOT from the factory is not totally surprising, but if the primers are falling out of the pockets I'd contact the manufacturer.
Have you fired any reloads? If so, they may give you a hard time. I wouldn't admit to reloads personally.
Either way though, factory 1x's fired brass shouldn't have loose primer pockets.
Tell them you noticed that the primers fell out when you extracted the spent cases. Tell them it's worrying you and you don't want to shoot it until they explain why. No other factory rifle has done this and it seems dangerous.
The brass is essentially scrap weight material now.
If it's only been fired one time in a factory rifle I'd suspect that you have a chamber and/or headspace issue.
Loading them really HOT from the factory is not totally surprising, but if the primers are falling out of the pockets I'd contact the manufacturer.
Have you fired any reloads? If so, they may give you a hard time. I wouldn't admit to reloads personally.
Either way though, factory 1x's fired brass shouldn't have loose primer pockets.
Tell them you noticed that the primers fell out when you extracted the spent cases. Tell them it's worrying you and you don't want to shoot it until they explain why. No other factory rifle has done this and it seems dangerous.
Re: reloading 300 remington ultra mag
I have a sendero 300 ultra mag, I get 2-3 loads out of them before the pockets get really loose. I had GAP build up an ultra mag and its a lot better. 4-5 loads before its scrap. My motto is you gotta pay to play.
just my 2 cents
Kc
I have a sendero 300 ultra mag, I get 2-3 loads out of them before the pockets get really loose. I had GAP build up an ultra mag and its a lot better. 4-5 loads before its scrap. My motto is you gotta pay to play.
just my 2 cents
Kc
Re: reloading 300 remington ultra mag
You've definitely got something going on. I've loaded for the 300rum for the last 9 years or so and can generally get around 8-12 loads out of a single case. I could probably get more out of some. Maybe you got some bad brass off the factory ammo. Was it Remington?
You've definitely got something going on. I've loaded for the 300rum for the last 9 years or so and can generally get around 8-12 loads out of a single case. I could probably get more out of some. Maybe you got some bad brass off the factory ammo. Was it Remington?
Re: reloading 300 remington ultra mag
I have remington brass and also Federal premium nickle plated brass, the issue occured in both brands. i dont know my velocity because i haven't fired any of my reloads due to this issue. i am reloading 180 grain nosler balistic tips, 180 grain nosler partitions, and 180 grain sierra pro-hunter bullets. i started with Reloader 22 powder at 83 grains which is the lowest charge in the new nosler book, but like i said i haven't fired any of these. i am not sure if it is the gun because i have two of these 300 ultra mags, but i am not sure which gun fired which brass. i have been told by friends that reload a lot that it could be just bad brass but in two different brands makes me question that theory. this whole reloading thing was supposed to allow me to shoot more often at a more economical price and it is turning out to be a nightmare similar to the movie "The Money Pit". what should be my next step? should i shoot the reloads that i have or trash it and start with new brass?
I have remington brass and also Federal premium nickle plated brass, the issue occured in both brands. i dont know my velocity because i haven't fired any of my reloads due to this issue. i am reloading 180 grain nosler balistic tips, 180 grain nosler partitions, and 180 grain sierra pro-hunter bullets. i started with Reloader 22 powder at 83 grains which is the lowest charge in the new nosler book, but like i said i haven't fired any of these. i am not sure if it is the gun because i have two of these 300 ultra mags, but i am not sure which gun fired which brass. i have been told by friends that reload a lot that it could be just bad brass but in two different brands makes me question that theory. this whole reloading thing was supposed to allow me to shoot more often at a more economical price and it is turning out to be a nightmare similar to the movie "The Money Pit". what should be my next step? should i shoot the reloads that i have or trash it and start with new brass?
Re: reloading 300 remington ultra mag
I'd take those 1x fired factory brass pieces that have the primers falling out and set them aside.
Go buy some more factory ammo and shoot a few and see if you can shake the primers out of those.
Call the rifle manufacturer and complain and request that they fix the thing.
It's not normal, a bad batch of brass might do this to a couple, but not as a rule.
I think there's something wrong with the chamber/headspace.
I'd take those 1x fired factory brass pieces that have the primers falling out and set them aside.
Go buy some more factory ammo and shoot a few and see if you can shake the primers out of those.
Call the rifle manufacturer and complain and request that they fix the thing.
It's not normal, a bad batch of brass might do this to a couple, but not as a rule.
I think there's something wrong with the chamber/headspace.
Re: reloading 300 remington ultra mag
Shoot what you have made so far. I personally like to start from scratch with new brass when loading up ammo. You never know what you are going to get when using factory brass.
Also, be carefull not to load these down too far. These big cases can have gas bleed back and dent the case shoulders. 83 grains looks to be a pretty low charge. I'd keep it up towards the middle to max powder charge.
Shoot what you have made so far. I personally like to start from scratch with new brass when loading up ammo. You never know what you are going to get when using factory brass.
Also, be carefull not to load these down too far. These big cases can have gas bleed back and dent the case shoulders. 83 grains looks to be a pretty low charge. I'd keep it up towards the middle to max powder charge.
Re: reloading 300 remington ultra mag
<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: ChadTRG42</div><div class="ubbcode-body">These big cases can have gas bleed back and dent the case shoulder.</div></div>
This "gas bleed back" i was wondering about that, cause i have had a few cases with dented shoulders,using: 96.5G Rl 25 and 168G Combined Tech)
Anyway to stop this or is this a problem that needs to be addressed? Been scraping the dented cases.
Ward
<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: ChadTRG42</div><div class="ubbcode-body">These big cases can have gas bleed back and dent the case shoulder.</div></div>
This "gas bleed back" i was wondering about that, cause i have had a few cases with dented shoulders,using: 96.5G Rl 25 and 168G Combined Tech)
Anyway to stop this or is this a problem that needs to be addressed? Been scraping the dented cases.
Ward
Re: reloading 300 remington ultra mag
You don't need to scrap the dented cases, just shoot a hotter load in them.
You can also try annealing the necks to get a better seal in the chamber neck if you want to shoot that load because the accuracy is really good.
I'd go with shooting the hotter load first though.
You don't need to scrap the dented cases, just shoot a hotter load in them.
You can also try annealing the necks to get a better seal in the chamber neck if you want to shoot that load because the accuracy is really good.
I'd go with shooting the hotter load first though.
Re: reloading 300 remington ultra mag
Hope things work out and I didn't just stir up the mud puddle more.
At least you have an excuse to go shoot more right?
Hope things work out and I didn't just stir up the mud puddle more.
At least you have an excuse to go shoot more right?
Re: reloading 300 remington ultra mag
i shot six of my reloads last night and had powder burn marks on the outside of the primer on one case, the rest of them shot fine. Now i have more questions. i shot 3 of the remington brass and 3 of the Federal brass and the Remington grouped less than an inch, but the Federal grouped about 3 inches at 100 yards. they were both loaded exactly the same and this has got me stumped. i dont believe that there should be any differences with the brass other than the Federal is nickle plated. my only thoughts are that the nickle plating makes a difference in the way they were resized and i only say this because i read that you should not resize nickle plated brass in conventional dies you should use carbide dies due to scratching issues. could this be a possibility? Thanks for all of the answers.
i shot six of my reloads last night and had powder burn marks on the outside of the primer on one case, the rest of them shot fine. Now i have more questions. i shot 3 of the remington brass and 3 of the Federal brass and the Remington grouped less than an inch, but the Federal grouped about 3 inches at 100 yards. they were both loaded exactly the same and this has got me stumped. i dont believe that there should be any differences with the brass other than the Federal is nickle plated. my only thoughts are that the nickle plating makes a difference in the way they were resized and i only say this because i read that you should not resize nickle plated brass in conventional dies you should use carbide dies due to scratching issues. could this be a possibility? Thanks for all of the answers.
Re: reloading 300 remington ultra mag
Think of it from an internal view. The internal case capacity from the two different brands will vary. This will cause the pressure to be different from case to case. You also have the different case neck thicknesses. When FL sized, this could cause different neck tensions on the bullet. These 2 factors, plus any other differences, will cause the round to be different than the next one, even though they have the same powder charge and primer. This is why I like to start from scratch with new brass for everything (or all the same brass head stamp). When you mix headstamps (mix brands) of brass, you get a hodge-podge of results. It's not bad for plinking ammo, but it's no bueno for making accurate rounds.
Measure the neck thickness on the two brands, and you should see that they will vary. Even a half of a thousandth of an inch (.0005") increases the neck tension by .001".
Think of it from an internal view. The internal case capacity from the two different brands will vary. This will cause the pressure to be different from case to case. You also have the different case neck thicknesses. When FL sized, this could cause different neck tensions on the bullet. These 2 factors, plus any other differences, will cause the round to be different than the next one, even though they have the same powder charge and primer. This is why I like to start from scratch with new brass for everything (or all the same brass head stamp). When you mix headstamps (mix brands) of brass, you get a hodge-podge of results. It's not bad for plinking ammo, but it's no bueno for making accurate rounds.
Measure the neck thickness on the two brands, and you should see that they will vary. Even a half of a thousandth of an inch (.0005") increases the neck tension by .001".
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