Was fb mentioned? Regardless, I've shot them in .104's and there was enough. Not a lot but enough to shoot very well. If a repeater, I'd want more but single fed, that is an over rated issue IME. I've shot a bunch of bullets with less than 1/16th" in the neck...fwiw. I could load one and measure it but it's more than 1/16" iirc. It's possible but I'd still try it. He's just fire forming so it won't matter unless they shoot great for him. Lol!
6 bra fire form with 70 grain bullets?
- Thread starter chop house
- Start date
0.140" in neck
Formed 40 PCs using about 29.5 of h335 mixed lots with 450 primers. No ftf. Running in low 3200 s. Only two hiccups: first shot after midpoint cleaning had slight swipe and sticky bolt lift. And Once I tried fiocchi srp and was dang close to blowing the primer...
Thanks for the help fellers... Actually got some groups under half inch.
Thanks for the help fellers... Actually got some groups under half inch.
Surprised you had any pressure signs at that low a speed. I'm betting if you try the loads I gave you, they'll put a big grin on your face...both speed and accuracy. I would consider anything in the 1/2 inch range at 100, either dang near completely out of tune or something wrong, somewhere, with a 6BR. I don't think it matters much that you're fire forming at the same time. You should be getting sub .25 moa or in that range and closer to 3400fps with the other powders. That's my experience anyway but if you're happy...rock on! If the point is to get em formed, it matters little but I think you'll like those loads
That's the main reason I only did less than half the brass. I am going back out with h322 and starting in the 30.3 range or so. My velocity was all over the place, es of 100 probably, then I remembered I just dumped two mostly empty bottles of h335 together without mixing. Vastly separated vintages.
Just wanted to get some brass to shoot some 80 Bergers lounging on the shelf
80's are a different load of course but when you get there, we can talk 80gr data some. 8208 has been tough to beat for me but there are other good ones. I'm always looking at options for 80s as I like them and my first choices 8208 and 4895 are both tough to find and afford. Benchmark can be very good too but 8208 was consistently the powder. I could get a little more speed from others from just tough to beat 8208, top to bottom..ime.
that is encouraging... 'cuz i have a little 8208 but don't want to squander it!
here is a pic of that single fiocchi primer i tried. i was proud of myself to be smart enough to stop... quickly. lol
and here is a 450:
Doesnt look like pressure but needs to pin/fp hole bushed. You did the right thing to stop before they blank though.
jackieschmidt
Gold $$ Contributor
I use 29 grains of 133 behind a regular 68 grn match bullet.
They come out like this.
They come out like this.
Looking good. I have 133 and 322 to try on next trip. Might use some ammerman 68 fb. They seem to be in good supply.
Agree. I'll never get the most out of that chambering with the fp set up like that
That's an real big FP indent???
My experience FF a 6BRX. Any powder should give you at least 55,000 PSI with a below max published charge, 55,000 should be much more pressure than hydroforming. I would look in reloading books and maybe pick a load 2 grains below max. That should give you plenty of pressure. Experienced shooters say it may take 2 shootings to finalize the case shape. I think it's mostly tthe corners of the shoulder on some calibers. I FF once then shoot normal loads with 0.010" jump. My 6BRX shoots small groups when FF. It's a GH hunting rifle. Shoots under 0.400" . I have shot a couple groups in the 1,s and maybe 1 out of 50 groups under 0.250". I log all my groups into Excel. I don't record true group size. Don't use flags. I record vertical and horizontal size for each group. The horizontal is almost always 0.100" bigger than vertical. I assume it's the wind. If I just look at vertical size I have a lot more groups under 0.250".
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