223 questions

[Confidis]

Hi I am a novice re loader under supervision of an adult! I have recently loaded 55g vmax up to 23.5 g of N133
(in 3 steps) it's accurate but 2 out of 10 primers (CCI) had slight craters no other signs so I'm happy with that once fired full length sized Winchester brass.
However I am struggling to find OAL and load data for 55g sierra game kings Spbt for N133. I also have N140 but I understand that it's not suitable . I use it for 308. Any advice or loads would be greatly appreciated.
tikka 223 12 twist .

 

[DVS1]

Seating Video

Hopefully this will help you with some of your questions bud, if not still some good info

 

[blueeyes]

Hi I load for my Rem 700 .223 in 1/12 twist with 55gn and N133 , funny enough 23.5 seems to be my sweet spot for both 55gn Sierra BK and Sierra GK at OAL 2.235 but yours could be different , this is a good couple of vids on the GK

 

[the prowler]

You need to make sure that the finished cartridge will fit in your magazine. Have oal just off the lands of the rifling.

 

[reddog]

I've a .223 rem 700, 1 in 12, 23.6 grains of N133, 55 grain v-max seated at 2,250 COAL shoots spot on.

 

[Laurie]

Here's a link to older Sierra 223 Rems load pages with its pressure gun data for N133 and the range of 55s. (More recent Sierra manuals have dropped most Viht entries.) Note Sierra uses Federal cases, a make which as a rule is heavier and has lower capacity than your Winchesters and whose use will increase pressures slightly. (There is a lot of variation between different makes of 223/5.56 case. Be careful if you change make in the future, and if so drop your charges slightly and work back up again.)

https://accurateshooter.net/Downloads/sierra223rembolt.pdf

You can try N140 with the 55gn Sierra SBT. It's just suitable and Viht gives loads for all the 55s it has tested bar the copper Fox model.

Rifle reloading data | Handloading | Rifle calibers | Centerfire Rifle bullets | Reload your own ammo - Vihtavuori

It's a tad slow burning for 55s really coming into contention with 68s and heavier bullets. N133 is better suited to the internal ballistics task with 55gn bullets, so stick with it if you can. N140 top charges are often compressed too with this bullet weight, requiring a slow pour, better still a funnel with a longer drop tube to settle the kernels and drop the top of the powder column to the bottom of the case-neck.

 

[Confidis]

Lots of lovely information to 'delve into.
It's much appreciated thanks for sharing.

 

[Wisecobandit]

Hi I am a novice re loader under supervision of an adult! I have recently loaded 55g vmax up to 23.5 g of N133
(in 3 steps) it's accurate but 2 out of 10 primers (CCI) had slight craters no other signs so I'm happy with that once fired full length sized Winchester brass.
However I am struggling to find OAL and load data for 55g sierra game kings Spbt for N133. I also have N140 but I understand that it's not suitable . I use it for 308. Any advice or loads would be greatly appreciated.
tikka 223 12 twist .

From the sierra manual.
At the bottom they give an accuracy load of 24.2g with viht 133
Coal for sbt (no 1365) is 2.250

 

[Confidis]

From the sierra manual.
At the bottom they give an accuracy load of 24.2g with viht 133
Coal for sbt (no 1365) is 2.250

Very helpful. Thanks.
I hope to get some time this weekend to slowly put some together.
Thanks all .

 

[ChesterP]

I've always found 23.6gr N133 (lapua and Sako brass) was an extremely accurate load for my rifle in the 50 to 55gr weight class, and around 22.4gr N133 for the 60gr Vmax