OOP'S , I ment to say 360s , glad you caught it jeff , I forgot about that with the ce arrows , the number not corrolating to spine . I used to shoot a patriot single , the first year they came out , nice bow , and it did stack fixed heads with fieldpoints . I shot magnus 100 grain heads , and 4" feathers on an offset , could not get muzzys to fly with that particular setup .