What you are asking is the difference between 5oz per square yard (Imperial) and 160grams per square meter (Metric).
1oz = 28.35 Grams
1yd = 0.91 meters
1yd2 = 0.836 Meters2
Therefore 1oz/Yd2 = 33.91g/M2
and 5oz/Yd2 = 169.55g/M2
or 4.72oz/Yd2 = 160g/M2
Assuming a resolution of +- 0.5 oz and +- 5 grams.
The answer is ... They are equivalent.
+- Marketing Hype and they mean nothing!!!
you can find it at http://www.winchester.com 160gr using AccuBond http://winchester.com/products/catalog/cfrdetail.aspx?symbol=S7MMWSMCT&cart=N21tIFdTTQ==&bn=5 140gr using AccuBond http://winchester.com/products/catalog/cfrdetail.aspx?symbol=S7MMWSMCTA&cart=N21tIFdTTQ==&bn=5 140gr using Silvertip http://winchester.com/products/catalog/cfrdetail.aspx?symbol=SBST7MMS&cart=N21tIFdTTQ==&bn=5
First, for your safety please DO NOT solicit reloading data from anonymous sources on the internet. In wikianswers- anyone can answer a question- for all you know, I am 12 years old, and Mom does not know I am on the computer (I'm not- but that is beside the point) Hornady does not recommend IMR 3031 for the 160 gr FTX bullet in 30-30. This is a link to the Hornady reloading page for your caliber. PLEASE do not use reload data except that which is published by a powder company, a bullet maker, or manufacturer of reloading equipment. Safe shooting to you= C3. supervisor
Notes: rifle: Winchester M94; barrel: Factory; length: 20"; twist: 1 in 12"; primer: WLR; case: Frontier; C.O.L.: 2.535"; approach maximum loads with extreme caution Be Alert: Publisher cannot be responsible for errors in published load data. Reduce by 10% and work up. Wt. Bullet Powder Manufacturer Powder Charge Velocity (FPS) 160 Hornady FTX Hodgdon H-4895 25.8 1800 160 Hornady FTX Hodgdon H-4895 26.8 1900 160 Hornady FTX Hodgdon H-4895 27.9 2000 160 Hornady FTX Hodgdon H-4895 28.4 2050 160 Hornady FTX Hodgdon H-4895 28.9 2100 Remarks: maximum load 160 Hornady FTX Ramshot TAC 24.7 1800 160 Hornady FTX Ramshot TAC 26.4 1900 160 Hornady FTX Ramshot TAC 28.0 2000 160 Hornady FTX Ramshot TAC 28.9 2050 160 Hornady FTX Ramshot TAC 29.7 2100 Remarks: maximum load 160 Hornady FTX Hodgdon H-335 25.7 1800 160 Hornady FTX Hodgdon H-335 27.1 1900 160 Hornady FTX Hodgdon H-335 28.5 2000 160 Hornady FTX Hodgdon H-335 29.2 2050 Remarks: maximum load 160 Hornady FTX Alliant RL-15 27.2 1800 160 Hornady FTX Alliant RL-15 28.2 1900 160 Hornady FTX Alliant RL-15 29.3 2000 160 Hornady FTX Alliant RL-15 29.8 2050 Remarks: maximum load 160 Hornady FTX Accurate AAC-2520 25.9 1800 160 Hornady FTX Accurate AAC-2520 27.9 1900 160 Hornady FTX Accurate AAC-2520 29.8 2000 160 Hornady FTX Accurate AAC-2520 30.7 2050 160 Hornady FTX Accurate AAC-2520 31.7 2100 Remarks: maximum load 160 Hornady FTX IMR IMR-4895 26.7 1800 160 Hornady FTX IMR IMR-4895 28.2 1900 160 Hornady FTX IMR IMR-4895 29.8 2000 Remarks: maximum load 160 Hornady FTX Winchester W-748 28.0 1800 160 Hornady FTX Winchester W-748 29.4 1900 160 Hornady FTX Winchester W-748 30.8 2000 160 Hornady FTX Winchester W-748 31.5 2050 Remarks: maximum load 160 Hornady FTX Hodgdon BL-C(2) 30.1 1800 160 Hornady FTX Hodgdon BL-C(2) 31.4 1900 160 Hornady FTX Hodgdon BL-C(2) 32.6 2000 160 Hornady FTX Hodgdon BL-C(2) 33.3 2050 Remarks: maximum load