Have never reloaded before and have been putting items together.I am working with cal 375 H&H mag.I bought a bag of remington brass and barnes tsx-270 grain flat base in 375 cal 375 dia. I am now looking things over and i noticed that the new rem brass tops are not very clean looking . Looking down at the case they look rough cut and not very round.Is this normal,or am i in for a learning exp?

I'm a fairly new reloader myself and had a similar question some time ago. What you need to do is run your new brass thru your sizing die just enough so that the mouth of the case returns to its round shape. I run all new brass thru this process. Don't forget to go ahead and chamfer the brass while you're at it.

Good luck!

quote:

What you need to do is run your new brass thru your sizing die just enough so that the mouth of the case returns to its round shape. I run all new brass thru this process. Don't forget to go ahead and chamfer the brass while you're at it.

and don't forget to lube the cases.....and yes this is normal for most American brass.

You beat me too that one VapoDog . Lube the cases X2

You might also measure length of Cases and make them all a standard 2.840 if their not already .

be sure to remove any lube after they have been reloaded , by wiping with a clean soft cloth .

Don't load a bunch the first time around , only load a couple say 5 or so test them .

If all is well and your happy with target results continue loading . If not try a different amount

of powder or another powder . In other words don't load a butt load of inaccurate rounds .

Experiment first and develop a Nice load for your Rifle .Preferably ones that makes one ragged hole

with #3-5 rounds !. As almost all rounds go bang , only interesting ones make single holes of multi

fired rounds .

I full length size ALL my new brass, as even the Norma .243 I bought had some dinged necks.
I've also had cases from Winchester & Norma that needed trimming to length after sizing.

It would be nice if you knew someone that loaded already to save you some headaches along the beginners path but you can find plenty of tips here as you go.

You didn't pick an easy caliber to start with. I also full length size all new brass. Especially the bulk brass, it gets diged in shipping. After your initial full length sizing, you'll want to partial size the brass so the small shoulder isn't setback. Inspite of the belted cae, you'll want to set you die to just accept the parially sized case for best case life.

The larger the brass, the more likely it will have dinged cases. I load for the 375 H&H also. As everyone said, lube and size your cases even if they are new and it is normal for the mouths to have some burs. Chamfer the the openings to smooth them out a little after sizing.

I would be very careful with loads off the internet. They can be used if you confirm the load is safe with a printed reloading manual that uses the same brass, primer, bullet and cartridge over all length (AKA how deep the bullet is seated in the brass). Remember that bullets of the same weight but different design or brand can change pressures.

OK, I use the 270 gr TSX and have found it to be very accurate. I use 76.5 grains of Alliant Reloader 15 for an estimated velocity around 2800 fps.
The barnes manual lists 77 grains as a maximum load with a Cartidge Over All Length of 3.570 inches.
It prints under an inch at 100 yards.
Since your just starting out. start with lower loads until you get more experienced at reloading.
the max load is 77, So what I do is load 20 cartridges. I'll load 5 with 75 grains, 5 with 75.5 grains, 5 with 76 grains, and 5 with 76.5 grains. Then I start with the weaker ones and check for pressure signs and accuracy as I move up to the faster rounds. I also seat the bullets out slightly more than the manual lists, just enough so I can still crimp in the first crimp groove.

I think the Barnes website has loads on it. Alliant Reloader 15 power and 270 gr TSX bullets have been awsome in my CZ 550 rifle.