about to start reloading my 1st batch of 300wm?

[Skum]

1st question should i wait to get my rifle? surgeon action mag fed. when it came to seating i was going to seat long and adjust to the mags or lands when the time came.

dies are redding bushing Fl sizer with .333 bushing and comp seater.

press is a hornady lnl ap. i am not going to run it as a progressive press.

100 pcs of NEW RWS brass "steps i am going to take"

1. uniform all flash holes "DONE"
2. uniform all primer pockets "DONE"
3. use hornady headspace gauge to measure for a .001/.002 bump. "heres where im at"
4. lube cases and bump .001/.002 with the fl sizer
5. run cases through my giraud case trimer to in/out chamfer and cut to "stuck here" book max or should i go a few thou under book max.
6. toss them back in the SS media to remove case lube.
7. hand prime them with F215m primers.
8. use redding powder trickler and dillon scale to load h1000 powder.
9. use comp seater to seat 208gr amax long and then reseat them later when i receive my rifle.

ive been loading 45acp for awhile and understand reloading, but i dont have much exp reloading magnum cases

if i forgot an important step or have any tips i would be thankful..

 

[FLIGHT762]

Re: about to start reloading my 1st batch of 300wm?

Regarding #5- If you're interested, you can get a chamber length gauge (or make your own) to see what your actual chamber length is. I was so anal about trimming to the minimum SAAMI specs. When I actually measured my chamber length in two custom 308's, I found one chamber was .030" longer than SAAMI max length and the other was .025" longer than SAAMI max length.

All that tedious worry for nothing. I will now probably trim @ SAAMI max for both rifles.

 

[Skum]

Re: about to start reloading my 1st batch of 300wm?

wont have my rifle for 3 to 4 weeks so the chamber length wont help me unless i wait.. but im very impatient

ill prob just trim to max...

 

[predatornut]

Re: about to start reloading my 1st batch of 300wm?

I like to run all new brass through a full length resizer to make sure everything is in spec. Obviously once you get your rifle you can adjust the die to bump the shoulder, but for now just run it according to the directions.
I trim the brass to be uniform. In other words find the shortest and trim them all to that length.
if you want to seat close to the lands don't bother until you get the rifle and can measure the chamber. It would be my luck to seat them too deep.

 

[Powder_Burns]

Re: about to start reloading my 1st batch of 300wm?

Don't load up until you have the rifle. You'd be pissed if you charged and seated all the bullets and then found out your rounds won't chamber because the shoulder isn't bumped back enough. Yeah, its not a real likely scenario but this happened to me about a month back with a new rifle, so take it for what it is.

 

[stockdoc]

Re: about to start reloading my 1st batch of 300wm?

Realize that new brass will headspace on the belt, since it will be undersized for your chamber. After firing in your chamber you can then use the case's shoulder to actually headspace the round. If you neck size after the first firing you will have much longer case life. After 3-4 firings then you can use a body die to bring the body back to proper dimentions. At that time you should also anneal the case neck/shoulder so you can have consistent neck tension on every round. You can keep doing this until the primer pockets get too lose, then toss the brass and start over again.

BTW, you might try standard 210M primers. They have a more consistent flame and will ignite the powder column more evenly. Your SD/ES will be much lower with std primers.

 

[Skum]

Re: about to start reloading my 1st batch of 300wm?

thanks all