I want to collect a list of all the case water capacity and maybe of older brass and new Lapua?
Or is there maybe a difference in Lapua 6.5 Grendel Brass in Europe and the US?
What's my actual problem, the fireformed brass have lot less case water capacity then QuickLoad calculates and you can't use the loads in the reloading manuals.
Ok that's no real surprise, that's why I bought new 6.5 Grendel Lapua brass and fireformed my old 220 Russian I used in my 6PPC before.
Both have almost the same water capacity, but lot less then Quickload calculates and I still can't use the loads written in the reloading manuals, not enough case capacity.
Now the surprising thing is that new S&B 7.62x39 brass fireformed to Grendel only have 0.7 grain less water capacity then my fired Lapua 6.5 Grendel.
And they have more capacity than the original Hornady 6.5 Grendel brass!
So here my avg. water capacity results after firing I would like to share and hope you could share your results to compare:
6.5 Grendel factory brass:
- Lapua 6.5 Grendel: 36.35 grain H2O / 1.524"
- Hornady 6.5 Grendel: 35 grain H2O / 1.515"
Fireformed brass:
- Lapua 7.62x39: 33.73 grain H2O / 1.501" (Easy to form, poor capacity and they are extremely soft. You will have very fast overpressure signs -> 27g Tac with 128g Scenar!)
- S&B 7.62x39: 35.58 grain H2O / 1.502" (They are quite tricky to form, doesn't work with a standard FL Die!)
- used .220 Russian brass, served before in my 6PPC: 35.42 grain H2O / 1.487"
Or is there maybe a difference in Lapua 6.5 Grendel Brass in Europe and the US?
What's my actual problem, the fireformed brass have lot less case water capacity then QuickLoad calculates and you can't use the loads in the reloading manuals.
Ok that's no real surprise, that's why I bought new 6.5 Grendel Lapua brass and fireformed my old 220 Russian I used in my 6PPC before.
Both have almost the same water capacity, but lot less then Quickload calculates and I still can't use the loads written in the reloading manuals, not enough case capacity.
Now the surprising thing is that new S&B 7.62x39 brass fireformed to Grendel only have 0.7 grain less water capacity then my fired Lapua 6.5 Grendel.
And they have more capacity than the original Hornady 6.5 Grendel brass!
So here my avg. water capacity results after firing I would like to share and hope you could share your results to compare:
6.5 Grendel factory brass:
- Lapua 6.5 Grendel: 36.35 grain H2O / 1.524"
- Hornady 6.5 Grendel: 35 grain H2O / 1.515"
Fireformed brass:
- Lapua 7.62x39: 33.73 grain H2O / 1.501" (Easy to form, poor capacity and they are extremely soft. You will have very fast overpressure signs -> 27g Tac with 128g Scenar!)
- S&B 7.62x39: 35.58 grain H2O / 1.502" (They are quite tricky to form, doesn't work with a standard FL Die!)
- used .220 Russian brass, served before in my 6PPC: 35.42 grain H2O / 1.487"
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