6MM-284 WINCHESTER
The following data was developed in a Remington 40X rifle that started life as a 6mm BR Remington. We were short on barrels for the 6mm, so decided that we will just rechamber the barrel for the 6mm-284 Winchester, and see what happens. The barrel probably has a 14-inch twist, so it might not stabilize the heavier bullets. Also, I would have preferred a 26-inch barrel for this caliber. I am not sure how many rounds have been fired through this barrel, but it could not have been very many, as the bore looked in very good condition.
We used Federal 210M primers in Winchester brass. All groups are 5 shots at 100 yards, and all bullets were molly coated. We also tried the Berger 88S bullet. The bullets all hit the target paper sideways making a group of just over 5 inches.
|
POWDER |
VELOCITY |
GROUP |
BULLET |
|
55.0 VVN 165 |
3427 |
0.418 |
NOSLER 55 BALLISTIC TIP |
|
58.0 |
3615 |
0.415 |
|
|
49.0 VVN 550 |
3653 |
0.398 |
|
|
50.0 |
3712 |
0.482 |
|
|
51.0 |
3773 |
0.363 |
|
|
52.0 |
3841 |
0.426 |
|
|
53.0 |
3910 |
0.680 |
|
|
54.0 |
3986 |
0.281 |
|
|
55.0 |
4020 |
0.846 |
|
|
56.0 |
4112 |
0.536 |
|
|
57.0 |
4206 |
0.691 |
|
|
55.0 VVN 560 |
3508 |
0.591 |
|
|
57.0 |
3662 |
0.628 |
|
|
58.0 |
3733 |
0.290 |
|
|
59.0 |
3819 |
0.566 |
|
|
60.0 |
3910 |
1.035 |
|
|
61.0 |
3967 |
1.079 |
|
|
62.0 |
4044 |
0.503 |
|
|
63.0 |
4136 |
0.704 |
|
|
50.0 VARGET |
3982 |
0.859 |
|
|
51.0 |
4040 |
0.653 |
|
|
52.0 |
4100 |
0.686 |
|
|
53.0 |
4179 |
0.551 |
|
|
54.0 |
4220 |
0.580 |
|
|
54.0 H 4831 |
3323 |
0.359 |
BRAWAND 68 |
|
56.0 |
3414 |
0.407 |
|
|
57.0 |
3528 |
0.575 |
|
|
58.0 |
3572 |
0.350 |
|
|
59.0 |
3638 |
0.704 |
|
|
60.0 |
3726 |
0.400 |
|
|
61.0 |
3805 |
0.520 |
|
|
55.0 RELOADER 19 |
3498 |
0.255 |
|
|
56.0 |
3521 |
0.644 |
|
|
57.0 |
3675 |
0.270 |
|
|
58.0 |
3728 |
0.432 |
|
|
59.0 |
3790 |
0.403 |
|
|
60.0 |
3863 |
0.777 |
|
|
53.0 RELOADER 22 |
3223 |
0.402 |
HORNADY 75 VMAX |
|
54.0 |
3277 |
0.311 |
|
|
55.0 |
3382 |
0.402 |
|
|
56.0 |
3415 |
0.623 |
|
|
57.0 |
3510 |
0.357 |
|
|
58.0 |
3600 |
0.493 |
|
|
59.0 |
3705 |
0.300 |
|
|
58.0 H 1000 |
3372 |
0.624 |
HORNADY 75 V-MAX |
|
60.0 |
3513 |
0.788 |
|
|
61.0 |
3568 |
0.775 |
|
|
62.0 |
3642 |
0.810 |
|
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