The AFTMA Standard						The AFTMA Standard + 1/2 Size Heavier
AFTMA Line Number	Target Head Weight	Tolerance about Target Weight	Approximate Weight per Foot in the Belly			AFTMA Line Number	Target Head Weight	Tolerance about Target Weight	Approximate Weight per Foot in the Belly
	grains	grains	grains				grains	grains	grains
1	60	54-66	2.20
2	80	74-86	2.93
3	100	94-106	3.67			3	110	104-117	4.00
4	120	114-126	4.40			4	130	124-137	4.73
5	140	134-146	5.13			5	150	144-157	5.46
6	160	152-168	5.87			6	173	165-181	6.30
7	185	177-193	6.78			7	198	190-205	7.21
8	210	202-218	7.70			8	224	216-231	8.17
9	240	230-250	8.80			9	260	250-270	9.47
10	280	270-290	10.27			10	305	295-315	11.10
11	330	318-342	12.00			11	365	343-367	13.17
12	380	368-392	13.93			12	415	403-427	15.10
13	450	435-465	16.50			13	475	460-491	17.33
14	500	485-515	18.33
15	550	535-565	20.17
Note #1: To convert weights from grains to grams simply divide the entry by 15.43						Note #1: To convert weights from grains to grams simply divide the entry by 15.43
Note #2: The head weight is measured at 30 feet from the tip						Note #2: The head weight is measured at 30 feet from the tip
Note #3: This table is useful for those wishing i) to check whether a newly purchased AFTMA line meets the head weight standard, ii) to design their own line, or iii) to chose line segments from which to make spey lines						Note #3: This table is useful for those wishing i) to check whether a newly purchased line which is 1/2 weight heavier than the standard meets this weight criterion, ii) to design their own line, or iii) chose line segments from which to make spey lines