7mm mag - 168 grain Accubond LR - H1000 question

[creedman12]

I did a test today with the following.

Ruger American Magnum 7mm mag - 24" barrel - 1:9 twist
168 gr Accubond LR
H1000
CCI 250 Primer
WInchester Silvertip 2x fired brass
CBTO 2.68 which is maximum to fit on the mag and .065 off the lands

Started at 67.0 grains and worked up to 70.0 in 0.5 increments. The groups started at about 1.5" at 67.0 grains and got better the higher I went. The best group was the 70.0 which was 0.85" at 100 yards. I had no pressure signs at any load.

Here are my questions.

1. Per the Nosler manual, 70.0 is the max for H1000 and this bullet. Given that I had no pressure signs and accuracy increased at every step up, does anyone think that 70.5 or 71.0 grains would be too much to test?
2. What other temp stable powders would you guys try? I have some H4831 I thought about giving a go.

I am not concerned about barrel life or throat erosion. This is a hunting only rifle that will only get shot a few times per year once the load is developed.

 

[Steel head]

I’d think H4831 might be a better choice for lighter bullets like the 168’s.
It’s magic with 168’s in my 7 saum.
As far as going further than book data with H1000 I almost certainly would within reason.

 

[Old Dude]

What are you using to seat the bullets. I have RCBS but Hornady says only to use their die with the special seating cone. I just bought 100 of the 230’s for my 300 WM.

 

[clcustom1911]

I did a test today with the following.

Ruger American Magnum 7mm mag - 24" barrel - 1:9 twist
168 gr Accubond LR
H1000
CCI 250 Primer
WInchester Silvertip 2x fired brass
CBTO 2.68 which is maximum to fit on the mag and .065 off the lands

Started at 67.0 grains and worked up to 70.0 in 0.5 increments. The groups started at about 1.5" at 67.0 grains and got better the higher I went. The best group was the 70.0 which was 0.85" at 100 yards. I had no pressure signs at any load.

Here are my questions.

1. Per the Nosler manual, 70.0 is the max for H1000 and this bullet. Given that I had no pressure signs and accuracy increased at every step up, does anyone think that 70.5 or 71.0 grains would be too much to test?
2. What other temp stable powders would you guys try? I have some H4831 I thought about giving a go.

I am not concerned about barrel life or throat erosion. This is a hunting only rifle that will only get shot a few times per year once the load is developed.

You can absolutely work up to 71. Maybe try 3-5 rounds each at 70, 70.3, 70.6, and 70.9.

But, also for hunting, a 0.85" group with 70gr is pretty awesome if you can replicate that a couple times, I'd say you have a good combo.

Edit... Sierra book says 70.8 is max with H1000 and 168's.