309 230 Lee success

[gunoholic]

So I ran some tumble lubed Lee 309 230 through my 10.5" 300 blk, very economical, so much so I bought most of the lead home with me smeared inside the barrel[emoji34] .
So I ordered some powder coating powder. And while waiting I tried gas checking, dip lubed because the 45/45/10 is just messy.
Loaded up 50 and some 312-160gn.
Adi 2205 worked OK, but had a couple fail to lock on the last round and worse yet they were doing 1120fps. Not so sub sonic.
Ar2206h (h4895) the next slowest powder I had, functioned perfect, last round locked back every time (5rds at a time), 980fps and sd15. Lots of unburnt powder.
The 312 160gn were good at 1800fps with ar2205.
They all shot minute of chrony at 5 paces.

http://images.tapatalk-cdn.com/16/01/26/7dfc6e8c9a181c0c26ae0f132005ba73.jpg
Shake and bake powder coating worked really easy even though it was raining.
Does anyone see any advantage gas checking the powder coated boolits?
COWW sized to .310.

[gunoholic]

http://images.tapatalk-cdn.com/16/01/26/950ec5086c0d848c8288b07c52d55f34.jpg
Sorry this photos a little clearer.

[petroid]

Unless you need the extra bearing surface of the gas check to aid in accuracy, I see no reason to use it on the PC bullets. Some report better accuracy with the gas check, some say it makes no difference. Mostly, I hear the accuracy of this design is less than satisfactory. I haven't tried exceptionally hard to get it to shoot tight groups. But it is minute of opossum at fifty yards for me.

[runfiverun]

I don't have an AR type 300 bo but have heard that some 8 twist barrels will have an issue with these boolits.

in my 1-7 rifles 3.5grs of shot shell powder will stabilize them well enough to shoot under an inch at 50 yds and just over that at 100 yds.
the trajectory gets to be pretty rainbow after that, but the wife and kids shoot mostly at 50-75yds anyway so I just 45/45 lube them, run them through the 310 sizer, and let them have at it.

you might have better luck with a faster powder like H-322.

[Ricochet]

Not so subsonic, but I have some sized down to .300" and paper patched back to .309" sitting on top of 85 grains of WC860 in .300 Weatherby Magnum. The original ones tumble lubed ran a little over 2800 FPS, were nowhere to be seen on the target but did kick up lots of dirt in the berm, and I got to take lots of my lead back home to boot! Sometimes you just have to see what happens when you do something crazy. I haven't been able to get out to the range for months and still won't for a few weeks, but I have hopes that the paper patched ones will actually hit near what I'm aiming at. :lol: