6x47 Rem load question

[Field_2_Fork]

I recently got myself a Rem 600 Mohawk in 6x47 Rem. I've been working on the stock a little, installed a metal trigger guard from Willie which has also required some fitment work to fit with the Timney trigger. I've really enjoyed this, all a first for me.

Went to load first rounds tonight and a couple questions came up, hoping for some advice.

1. I bought 250 new Nosler brass in .222 Rem Mag. Sized the neck with a Sinclair 6mm mandrel that measures .2415 on my mic. Tonight I went to load a few and the case neck collapsed as I was attempting to seat the bullet.
I was somewhat surprised, didn't think the .0035 neck tension would be too much. ?

I have a K&M neck sizing mandrel that measures .2424, I plan to run the cases through this and try again. Sound right?

2. Planning to load with W748 and 58gr Vmax, previous owner said that shot pretty good. (he's a hunter, no BR accuracy really)

When I was filling cases it was apparent I would be getting to some compressed loads. Any concerns here, with a ball powder?

Compressed load is also a first for me, how much is too much?

The best data I could find (I've googled for weeks) is in my Lee manual, it has data using BL-C(2) which is directly beside W748 on burn rate chart. Planning to use that data. Any issues there?

Much thanks.

Pic for attention.

 

[Bill Norris]

Looks like the seater die was screwed way too deep into the press from the pic above.

 

[LCazador]

I recently got myself a Rem 600 Mohawk in 6x47 Rem. I've been working on the stock a little, installed a metal trigger guard from Willie which has also required some fitment work to fit with the Timney trigger. I've really enjoyed this, all a first for me.

Went to load first rounds tonight and a couple questions came up, hoping for some advice.

1. I bought 250 new Nosler brass in .222 Rem Mag. Sized the neck with a Sinclair 6mm mandrel that measures .2415 on my mic. Tonight I went to load a few and the case neck collapsed as I was attempting to seat the bullet.
I was somewhat surprised, didn't think the .0035 neck tension would be too much. ?

I have a K&M neck sizing mandrel that measures .2424, I plan to run the cases through this and try again. Sound right?

2. Planning to load with W748 and 58gr Vmax, previous owner said that shot pretty good. (he's a hunter, no BR accuracy really)

When I was filling cases it was apparent I would be getting to some compressed loads. Any concerns here, with a ball powder?

Compressed load is also a first for me, how much is too much?

The best data I could find (I've googled for weeks) is in my Lee manual, it has data using BL-C(2) which is directly beside W748 on burn rate chart. Planning to use that data. Any issues there?

Much thanks.

Pic for attention.

So you didn't size the cases you just ran a mandrel through and then you're fireforming? Yes that first mandrel leaves way too much neck tension and that's probably what caused the case to collapse. Try the second mandrel it should work much better. Did you try an empty case to see if it chambers well? Is the rifle marked 6X47 from factory or did someone rechamber. I've collected Remingtons for the last 50 years and I'm not aware of a 6X47 made in any model other than the 40X. That caliber was a custom shop only edition by Mike Walker but stranger things have happened. At any rate here's some loads out of the Hodgdon No. 27 manual. I've been shooting this caliber since the early 80's in benchrest. I own an original 40x in this caliber. All loads are for 60 grain jacketed hollow point bullet.
1). H335 starting load: 28gr. maximum load: 30.0 gr- 3202 fps
2). B L-C2 start: 28.5 gr. Max 30.5 gr- 3233 fps
3). H-322 start: 26.2 gr. Max 28.0 gr-3222 fps
4). H-4198 start 22.0 gr. Max 24.0 gr- 3170 fps
5). H4895 start 26.0 gr. Max 28.5 gr. - 3098 fps
Do all your fireform at lower end and seat at jam for a good fireform. After fireform work loads up at .010" off the lands. My best powders are H322 and N133.

 

[DocDoc]

I agree with the idea that the die is down so far that the end of the case hits internally and collapses the case before the bullet is completely seated. Try backing the die out and lowering seating stem. You can also collapse the neck with too much tension. I have seen a similar collapse in trying to expand a .243 Win case to .260 Rem in one step.

 

[Kurz]

This data is posted by Hornady through their website:



I built lots of these in the 90s as depredation rifles which went to Africa for the PHs using them to cull the small antelope. Small, lightweight, low recoil and very accurate when built correctly. Many of the PHs reloaded for themselves and used this 58 gr. VMAX as a staple.

I found:

Re-7
IMR-4198
VVN-130

to be the highest performing and efficient powders. Too many powders suggested waste a significant part of the load weight.

Enjoy!

 

[Field_2_Fork]

Looks like the seater die was screwed way too deep into the press from the pic above.

Unfortunately this isn't the case. (ha!) I had the ram all the way up with a bullet sitting on the case, then screwed the die in until it touched the bullet, then a bit more of a turn down.

I should add, after the first one collapsed I tried dipping the case neck and/or the bullet in graphite to slick it up. That didn't help.

 

[Field_2_Fork]

So you didn't size the cases you just ran a mandrel through and then you're fireforming? Yes that first mandrel leaves way too much neck tension and that's probably what caused the case to collapse. Try the second mandrel it should work much better. Did you try an empty case to see if it chambers well? Is the rifle marked 6X47 from factory or did someone rechamber. I've collected Remingtons for the last 50 years and I'm not aware of a 6X47 made in any model other than the 40X. That caliber was a custom shop only edition by Mike Walker but stranger things have happened. At any rate here's some loads out of the Hodgdon No. 27 manual. I've been shooting this caliber since the early 80's in benchrest. I own an original 40x in this caliber. All loads are for 60 grain jacketed hollow point bullet.
1). H335 starting load: 28gr. maximum load: 30.0 gr- 3202 fps
2). B L-C2 start: 28.5 gr. Max 30.5 gr- 3233 fps
3). H-322 start: 26.2 gr. Max 28.0 gr-3222 fps
4). H-4198 start 22.0 gr. Max 24.0 gr- 3170 fps
5). H4895 start 26.0 gr. Max 28.5 gr. - 3098 fps
Do all your fireform at lower end and seat at jam for a good fireform. After fireform work loads up at .010" off the lands. My best powders are H322 and N133.

Correct, I simply sized the necks up. From what I've read I thought that is all that is needed.

The rifle has an aftermarket barrel, RKS, Ron Smith here in Alberta. Very highly regarded. I spoke with him on the phone recently, he's nearly 89 and getting ready to shut down his business. It didn't sound very promising about anyone taking over, his son (age 65) has worked with him but his health isn't great, and the chances of the grandson following suit sound slim. Too bad.

 

[Field_2_Fork]

This data is posted by Hornady through their website:

View attachment 1246080

I built lots of these in the 90s as depredation rifles which went to Africa for the PHs using them to cull the small antelope. Small, lightweight, low recoil and very accurate when built correctly. Many of the PHs reloaded for themselves and used this 58 gr. VMAX as a staple.

I found:

Re-7
IMR-4198
VVN-130

to be the highest performing and efficient powders. Too many powders suggested waste a significant part of the load weight.

Enjoy!

Thank you for that. I didn't see that before, not sure how I missed it!

 

[LCazador]

Correct, I simply sized the necks up. From what I've read I thought that is all that is needed.

The rifle has an aftermarket barrel, RKS, Ron Smith here in Alberta. Very highly regarded. I spoke with him on the phone recently, he's nearly 89 and getting ready to shut down his business. It didn't sound very promising about anyone taking over, his son (age 65) has worked with him but his health isn't great, and the chances of the grandson following suit sound slim. Too bad.

Lots of great craftsmen passing. Yes all that is needed is a mandrel to size up to .243" for fireforming. A couple of very important things after you fireform. Make a note of headspace and case length. If you have a Sinclair case length gauge use it for the maximum length. It may be SAMMI length but it's best to know exactly.

 

[Kings X]

I got to say it looks like way too much neck tension. I would look for no more than .002”. That brass my be weak in the shoulder area.
i Think I still have a couple boxes of Federal 6x47 match brass.

 

[Field_2_Fork]

I got after these loads again last night.
Ran the (unfired) brass through the bigger mandrel, went to push a bullet in the first one, and wouldn't you know it, crumpled the shoulder again.

This really made me sit and think, when I realized I had the stem of the die up too far, and I think I was crimping the neck. I've never crimped a neck before so I've honestly never thought too much about it and how the die would be set up for that.

I turned the stem down a couple turns and surprise-surprise, the bullet almost dropped right in.

Now I have 20 rounds loaded with next to no neck tension. I'm tempted to pull them and start over, but maybe I'll just shoot them and get a start of fire forming.

I've definitely learned a thing or two with this one. Thanks for all the advice.

 

[Field_2_Fork]

Looks like the seater die was screwed way too deep into the press from the pic above.

Yup. I didn't see it for awhile, but this was it.

 

[Bill Norris]

Yup. I didn't see it for awhile, but this was it.

Glad it all worked out for u.

 

[Adam 6mm build]

H4895 is a really good powder for that cartridge mine loves 26.5 and a 66grn malurba almost a one hole 5 shot group at 100yrds