280man said:
yes they are. I can't quote the rule off the top of my head but I think it says that such things must be flat meaning no spikes that goes in the ground
NO THEY ARE NOT! PER THE NRA RULES, WHICH I THINK YOU BOTH SHOULD READ:
Complete High Power Rule Book:
http://www.nrahq.org/compete/RuleBooks/HPR/hpr-index.pdf
3.4.1 Rifle Rests -
(a) F-Class Open Rifle (F-O) - The rifle may be supported by any means which provide no positive
mechanical method for returning it to its precise point of aim for the prior shot. Subject to:
(1) No more than two rests may be used. If two rests are employed, they may not be attached to each
other.
(2) The use of any form of a table is prohibited. Separate flat boards or plates not exceeding the dimensions of the individual rests by two inches are allowed to be placed under the front and/or rear rests. See Rule 3.4.1(a)(1).
No leveling screws or protrusions are allowed on these boards or plates. They must be flat on the top and bottom.
This discipline is a modification of high power prone shooting, not a form of bench rest and should not
be construed as such.
Disabled competitors may apply to the NRA Protest Committee for appropriate dispensation.
The intent of this rule is to prevent the use of a table type device.
(3) A front rest may be employed for either the rifle’s fore-end or for the forward hand. If attached,
clamped, or held to the rifle, the front rest must be included in the rifle’s overall weight (Rule 3.4(a)).
(4) No portion of the rifle’s butt or pistol grip shall rest directly on the ground or on any hard surface.
Furthermore, any rear rest employed shall not be attached, clamped, or held onto the rifle in any
manner. Mechanically adjustable rear rests are not allowed.
(5) As an alternative to (3) or (4), the rifle may be rested on a simple central support such as a rolled jacket, towel, blanket, or groundsheet, or upon a sandbag or beanbag.
(6) Any number and type of objects may be placed beneath each rest to compensate for variations in the height of the slope of the firing point or to reduce its rolling.
(7) The
front rest or base may have up to three spiked feet which may be pressed into the ground by no more than 50mm (approximately 2 inches) provided this causes no significant harm to the firing point.
(8) Rests may be adjusted after any shot to compensate for rest movement or settling. A sling may be used in conjunction with the rest(s), but its weight will be included in the rifle’s overall weight (Rule
3.4(a)).
This should never make it past Tech. or any Line Judge/Jury Member.