10-14-2013, 06:04 AM
I've put a fair few rounds downrange with the little Grendel over the last two months, also with the 6.5/06 and the Heavy Barrelled Rem700 6.5x47 Lapua.
The little Grendel has decided that it really does not like the 100gn AMAX. Nothing I tried could deliver decent accuracy from that bullet with groups hovering around the 1.5MOA mark.
Conversely, the 100gn NBT over 31.5gn of 8208 clocked a nice repeatable 2960fps (ES of 12 and SD of 8) with three shot groups consistently coming in at sub MOA. They would be tighter if I put the effort in, but to be honest I'm not interested in ultra accuracy from this rifle, just good "minute of pig" out to 200m. I managed to get the 100gn NBT up to over 3000fps with 32.5gn of 8208 but accuracy was no better and the stress on the cases was obviously greater.
I've come to the conclusion that for greater speeds out of the bolt action Grendel I need a powder that is mid way between 8208 and 2208 (Varget), I might give some 2206H (H4895 to Americans) a try. I'm going to give some 2206H and 2208 a try over Christmas.
Sighted in 1.5in high at 100m means it will be 1.5in low at 200m. This makes for an easy Fallow, pig and goat rifle for my normal hunting area. Pretty decent fox rifle too for that matter.
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The little Grendel has decided that it really does not like the 100gn AMAX. Nothing I tried could deliver decent accuracy from that bullet with groups hovering around the 1.5MOA mark.
Conversely, the 100gn NBT over 31.5gn of 8208 clocked a nice repeatable 2960fps (ES of 12 and SD of 8) with three shot groups consistently coming in at sub MOA. They would be tighter if I put the effort in, but to be honest I'm not interested in ultra accuracy from this rifle, just good "minute of pig" out to 200m. I managed to get the 100gn NBT up to over 3000fps with 32.5gn of 8208 but accuracy was no better and the stress on the cases was obviously greater.
I've come to the conclusion that for greater speeds out of the bolt action Grendel I need a powder that is mid way between 8208 and 2208 (Varget), I might give some 2206H (H4895 to Americans) a try. I'm going to give some 2206H and 2208 a try over Christmas.
Sighted in 1.5in high at 100m means it will be 1.5in low at 200m. This makes for an easy Fallow, pig and goat rifle for my normal hunting area. Pretty decent fox rifle too for that matter.
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