THE HANDLOADING BENCH
Table 3 RESULTS Standard Large Primer Brass (Lapua / Federal 210M primer unless otherwise advised) Powder
Batches
190gn Sierra MatchKIng 42.0-44.0gn Viht N150 5x5-rounds 44.0-47.0gn Viht N550 5x5-rounds
200gn Sierra MatchKIng 44.0-45.5gn Allt. Re17 5x5-rounds
210gn Berger BT Long-Range 43.5-45.4gn
8x3-rounds 41.5-44.0gn Allt. Re17 7x3-rounds
210gn Berger VLD 42.0-44.2gn Allt. Re17 7x5-rounds 42.2-44.5gn Viht N550 9x5-rounds
0.4-0.6” 0.3-1.1”
0.3-0.9”
0.3-0.95” 0.1-0.5”
0.2-0.5” 0.5-1”
Groups
2,677 / 5 2,798 / 18
2,634 / 21
2,624 / 10 2,559 / 17
2,577 / 11 2,620 / 20
Lapua Palma Brass (CCI-BR4 primer unless otherwise advised) Do not use top loads in standard brass with large primers Powder
Batches
190gn Berger VLD 45.1-46.5gn Viht N550 5x5-round
200gn Sierra MatchKing 45.4-46.7gn Viht N550 6x5-rounds 46.6-47.0gn Viht N550 5x5-rounds
208gn Hornady A-Max 44.4-45.5gn Allt-Re17 5x5-rounds 45.2-45.4gn Allt. Re17 3x5-rounds 45.2-45.4gn Allt. Re17 3x5-rounds 42.2-44.0gn Viht N550 8x3-rounds 40.4-43.0gn H. VarGet 8x3-rounds
210gn Berger VLD 44.4-45.5gn Allt. Re17 5x5-rounds
210gn Sierra MatchKing 41.8-44.0gn Viht N550 8x3-round
0.9-1.35”
0.5-1” 0.5-1”
0.3-1.2” 0.4-0.9” 0.6-1”
0.2-1.25” 0.45-0.95”
42.8-44gn IMR-4007ssc 8x3-rounds 0.5-1” 45.6-47.7gn H414 8x3-rounds 0.4-1”
0.6-1.1” 0.3-1” Excessive pressures above 44.4gn (See text)
308 Winchester Rides Again Part 4 By Laurie Holland
MV/ES Comments
Norma cases / CCI-200 Norma cases / CCI-200
Over-high pressure indications at 44/44.2gn CCI-200 primers
Groups 2,788 / 43
2,720 / 16 2,757 / 23
2,611 / 25 2,615 / 21 (45.3gn)
2,615 / 26 (45.3gn) CCI-450 SRM primers BR4 2,587 / 15 2,635 / 23 2,579 / 30 2,698 / 4
2,605 / 41 2,566 / 7 MVs are for the highest charge unless otherwise advised.
IMPORTANT NOTICE - These components and loads performed safely in the author’s rifle: this cannot be guaranteed for other firearms. Good handloading procedures should be used working loads up from low starting levels while looking for signs of excessive pressure. Be aware that standard (large primer) cases may produce a rapid pressure increase as top loads are approached. Use small charge weight increases for the top 1-1.5gn weight (0.2 and 0.3gn steps) in both types of case. Be aware of the importance of barrel throat ‘freebore’ length – these charges are not to be used in short-throated chambers optimised for 155gn bullets.
85 Bullet deep with barrel throating. Compressed chg.
Over-high pressure indications at 43.8 / 44.0gn Over-high pressure indications at 42.8 / 43.0gn Heavily compressed Charges. Too low MVs Top load (4-rounds) Smallest group. Dirty necks
MV/ES Comments
Page 1 |
Page 2 |
Page 3 |
Page 4 |
Page 5 |
Page 6 |
Page 7 |
Page 8 |
Page 9 |
Page 10 |
Page 11 |
Page 12 |
Page 13 |
Page 14 |
Page 15 |
Page 16 |
Page 17 |
Page 18 |
Page 19 |
Page 20 |
Page 21 |
Page 22 |
Page 23 |
Page 24 |
Page 25 |
Page 26 |
Page 27 |
Page 28 |
Page 29 |
Page 30 |
Page 31 |
Page 32 |
Page 33 |
Page 34 |
Page 35 |
Page 36 |
Page 37 |
Page 38 |
Page 39 |
Page 40 |
Page 41 |
Page 42 |
Page 43 |
Page 44 |
Page 45 |
Page 46 |
Page 47 |
Page 48 |
Page 49 |
Page 50 |
Page 51 |
Page 52 |
Page 53 |
Page 54 |
Page 55 |
Page 56 |
Page 57 |
Page 58 |
Page 59 |
Page 60 |
Page 61 |
Page 62 |
Page 63 |
Page 64 |
Page 65 |
Page 66 |
Page 67 |
Page 68 |
Page 69 |
Page 70 |
Page 71 |
Page 72 |
Page 73 |
Page 74 |
Page 75 |
Page 76 |
Page 77 |
Page 78 |
Page 79 |
Page 80 |
Page 81 |
Page 82 |
Page 83 |
Page 84 |
Page 85 |
Page 86 |
Page 87 |
Page 88 |
Page 89 |
Page 90 |
Page 91 |
Page 92 |
Page 93 |
Page 94 |
Page 95 |
Page 96 |
Page 97 |
Page 98 |
Page 99 |
Page 100 |
Page 101 |
Page 102 |
Page 103 |
Page 104 |
Page 105 |
Page 106 |
Page 107 |
Page 108 |
Page 109 |
Page 110 |
Page 111 |
Page 112 |
Page 113 |
Page 114 |
Page 115 |
Page 116 |
Page 117 |
Page 118