Finally shot new 6 BRA
- Thread starter KeithF
- Start date
It’ll go to crap. Sending my shipping address for barrel shipment once your done FF’ing. Thanks
mikeeg02
Michael Glantz
Looks pretty familiar. Mine did the same at 29.6 of h4895, find your seating depth.
good shooting.JohnMill
Gold $$ Contributor
Ya gotta believe!!
Alex Wheeler
Site $$ Sponsor
During fireforming something happens that causes everything to shoot well. My theory is the lack of pressure and the soft curve prevents a normal harmonic pattern from beginning. What I am saying is you will actually have to tune the load after your done fire forming, its not gonna shoot just anything you feed it like it will forming.
tvaught
Gold $$ Contributor
Alex, I like this theory.
I know this out on the fringe, but have you tried sizing a fired BRA case back to or close to BR virgin size, but maintaining the neck/shoulder junction dimension....and then refiring those cases to see if the magic tune tolerance is still there.
I can think of all kinds of reasons, this shouldn't work, but I find the more I shoot, the more I have yet to learn.
Alex Wheeler
Site $$ Sponsor
I have considered purposely mismatching shoulder angle on reamers and dies to try an emulate this. Not only would case life suck, we NEED the vertical harmonic to tune for long range so, while ff-ing load may shoot one hole at 100, they wont compete at 1k.
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KeithF
Silver $$ Contributor
I’m almost 100 shots into tuning. It still shoots the 105 HVLD well in a wide window of charge weight. 30.7 H4895 @.008-.010 jam has been the best. I need to shoot a local match and see how that load/gun will handle a 60 rd match. Guys like Alex, Tom, and a couple more names that escape me, have made development for this round quite easy. Thanks to y’all for sharing your info/research on this caliber.
I tried this with a piece of brass for giggles....I don’t recommend it.
Attachments
All you needed was for the neck to split completely and you would have had the full house there
I fireformed 97 BRA cases last week for about 93-94 rabbits and other pests. (With my target rifle)
Today was the barrels first visit to an actual range, where I zeroed the new barrel and cronographed a powder load. The 30.5gns gave me 2940 fps out of its 27.75" barrel, so on my next visit to a range, I will now be close to where I need to be with loads.
Today was the barrels first visit to an actual range, where I zeroed the new barrel and cronographed a powder load. The 30.5gns gave me 2940 fps out of its 27.75" barrel, so on my next visit to a range, I will now be close to where I need to be with loads.
Welcome to the BRA club Rod, it will no doubt form a formidable combination in your hands.
tvaught
Gold $$ Contributor
Gilbert, and Alex, Thank you for sharing.
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