A friend of mine is trying to find data on the 6mm-284. I told him that I may be able to help him so Iam asking all of you on this site for any data you can share. Im looking powder gr bullet weight bullet speed
80gr Berger Moly MEF 56.5gr of H-4831SC Velocity - 3650fps+/- Sub MOA Accuracy
Note - This load is 1.5gr above the max published load of 55.0gr of H-4831. Since I am shooting a moly bullet, I added powder to address the lower chamber pressure. Your friend should start at the starting load data that txhunter provided. If he decides to load moly bullets, he should use a chronograph and watch for pressure signs if he wants to squeeze the load.
In my opinion, the 6mm-.284 is the best 6mm varmint cartridge. It can reach out an vaporize a hog.
Posts: 10780 | Location: Test Tube | Registered: 27 February 2001
Note that the 6mm-284 has a case capacity almost identical to the .240 Weatherby. Mine has a long throat made so the 105 Speer spitzer can be seated flush with the base of the neck, which makes it sorta "freebored" when used with shorter bullets. I have been able to use .240 Wea starting loads in this 6mm-284 for beginning load developement, with no problems at all. MAYBE others could do so also, just remember every rifle is different, particularly when working with wildcats like the 6mm-284. By the way, I consider this cartridge equal to the .240 Wea ballistically, and SUPERIOR accuracy-wise. Besides, it doesn't have that pesky belt!!
Zero Drift: What case, primer, and seating did you use with your 6mm-284. I took mine out of mothballs to go after some gophers this spring. Haven't used it in 10 or 15 years so "new everything" is eyeballing me.
I necked and trimmed 6.5mm -.284 Lapua brass because factory brass was not available several years ago. I purchased 100 cases and the Lapua brass is still in great condition after 10+ reloads. In any event, Norma brass is very good. I would suggest that you save yourself a lot of time and trouble and purchase this brass.
My gun utilizes a very tight chamber just within SAAMI specifications. So your seating depth could be quite different than my chamber. If you have a fired case, I would suggest that you send it to Stony Point so that it can be threaded for their seating depth tool. This tool is invaluable for varmint shooting to monitor throat erosion. I use the Federal Gold Metal Match primers and a set of custom cut Redding Competition dies.
The 6mm-.284 is gaining a lot of attention these days. All of the reloading components for the cartridge are readily available. While moderately overbore, it is a wonderful prairie-hog vaporizer with frangible bullets like the Berger MEF. I have taken my loads over 3750 fps. I won�t say how far over this number, but the bullets did not survive outside the muzzle for long.
Posts: 10780 | Location: Test Tube | Registered: 27 February 2001
Thanks for the info, Zero Drift. Just looking for data. Seating depths and components are certainly rifle specific but it gives a starting point that's close sometimes. Where did you get the Lapua brass? I've looked and checked and all I can find is Hornady 6.5mm-284which I ordered. I still have a few hundred WW 284 but that's a REAL pain convert. I hate buying new brass considering all the stuff I have lying around just waiting to be used.
