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Re-loading question

13 Dec 2014
@ 01:10 pm (GMT)

Ben Grady

Hi guys

I am still waiting for Nathans re-loading book to arrive in my mailbox so I have question that wasn't really answered before in one of my threads.
When I first load a new projectile for a given cartridge, I sort out the OAL with one of the given methods (hornady gauge seems to work well). I then seat the projectile 1mm off the lands and start loading in .5 gr increments from half way between min and max (book data) and work my way up (checking for pressure signs as I go, once at the range shooting). The question I have is Nathan seems to lean towards seating the bullet to the bottom of the neck for max concentricity. Would this be a better starting point than 1mm off the lands when developing an accurate load. Would this have more chances of being accurate straight off, than 1mm off the lands each time. What do you guys do first off for seating depth?

cheers Ben

Replies

13 Dec 2014
@ 02:39 pm (GMT)

Nathan Foster

Re: Re-loading question
Hi Ben, it depends upon the actual cartridge design. For example, the 7mm-08 and .308 Win are designed with long freebore. The same goes for the Weatherby and RUM's. Generally speaking, the closer we try to get to the lands, the worse we make things. But with other cartridge designs, we can get right up close and still maintain a good relationship within the case neck.

All of this is explained in the book you ordered along with step by step guides for assessment. I think you will find this most helpful. Also determining max will be useful for you.
13 Dec 2014
@ 06:51 pm (GMT)

Mike Neeson

Re: Re-loading question
Hi Ben, the COAL will also depend on the size of your magazine. No good being 1mm off the lands if the cartridges wont fit in your mag! In my rem700 308, the magazine length is the deciding factor at 72mm. The COAL I use is 71mm to allow easy feeding and good neck alignment.
13 Dec 2014
@ 08:27 pm (GMT)

Glenn Edwards

Re: Re-loading question
Hey Ben another consideration is seating into the lands and working up loads to establish safe working pressures then working back from there with seating depth. Like mike says though, there's no point seating out past what the mag will allow. I have a 7mm 08 and a 7mm rem mag that have magazine lengths that allow me to seat out to the lands, this is my approach.
13 Dec 2014
@ 09:18 pm (GMT)

Mike Neeson

Re: Re-loading question
Ben, you may just want to wait for the book. Nathan explains it in great detail.
13 Dec 2014
@ 09:19 pm (GMT)

Ben Grady

Re: Re-loading question
O.K. Magazine length is not an issue. My 25-06 rem is a P17 action and my 303-25 is a lee enfield no4 mk1 both designed for bigger cartridges. So I should be able to seat the projectile a long way out. So for a 25-06 rem do I seat the projectile to a/ the line of the neck for concentricity or b/ 1mm off the lands, (when developing a load).
What would you guys do for your first loads if you were me? Say you are at the bench doing a first re-load for your 25-06 rem.
Where would you seat the bullet for a first re-load if you could at any length first off.
13 Dec 2014
@ 09:31 pm (GMT)

Ben Grady

Re: Re-loading question
Quote:
Ben, you may just want to wait for the book. Nathan explains it in great detail.


Mike, you can't tell a 44 year old kid to wait till his x-mas pressie arrives.
"Just wait for the book" that's what my Dad would have said (may he rest in peace). Oh well bugger it, I'll just have to wait then. How many sleeps?
13 Dec 2014
@ 09:39 pm (GMT)

Mike Neeson

Re: Re-loading question
I'm sorry Ben, I don't have any experience with these cartridges. But my first consideration would be making sure the projectile has the best support possible - as much of the parallel of the projectile supported by the neck. If that's not a problem, then 1mm off sounds good to start. I'm sure Glen has had great success with his method too. With a small jump, It will give some protection against pressure spikes and irregularities in the bullet ogive. If the projectile is just touching the lands, small irregularities in the ogive can give big changes in pressure. Jamming into the lands is a better proposition but no good for hunting as you may get an action full of powder when an unfired cartridge leaves the projectile behind on extraction. I'm thinking that start with a good concentric, well supported projectile with a little jump, as you were planning on, find the powder charges that look good and from there you can fine tune. It's all explained waaaay better in the book and I hope someone will correct me if I'm wrong.
13 Dec 2014
@ 09:42 pm (GMT)

Mike Neeson

Re: Re-loading question
Haha looks like we're both typing at the same time. Hope this helps... only 10 more sleeps...
14 Dec 2014
@ 12:01 am (GMT)

Mike Davis

Re: Re-loading question
first off Im not a tack driving shooter. a deer under 300 is in big trouble though.
what I do/ recommend is assuming you have fired a few rounds through this rifle???? grad a loaded round of the type that shot best and set seating die with that and go from there......others have flasher/more precise way of doing it but that works for me.
 

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