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Details about  Shooting Chrony Alpha Chronograph SHTALPHA

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Shooting Chrony Alpha Chronograph SHTALPHA
Item Ended
Item condition:
16 Feb, 2015 17:36:13 GMT
Free Standard Delivery | See details
Item location:
Weymouth, Dorset, United Kingdom


eBay item number:
Seller assumes all responsibility for this listing.
Last updated on  31 Jan, 2015 21:24:23 GMT  View all revisions
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Item specifics

New: A brand-new, unused, unopened and undamaged item in original retail packaging (where packaging is ... Read moreabout the condition

Shooting Chrony Alpha Chronograph SHTALPHA

Measures speed of bullets, arrows, shot, pellets, paintballs, etc. from 30 to 7000 ft per second. Mount on tripod or place on table. Measures 7-1/2x4-1/2x2-3/4" when folded. Made of 20 gauge steel. Weighs less than 2-1/2 lbs. Uses one 9 Volt alkaline battery (not included) for 48 hours of continuous use. Gives numbered shot velocities. Velocity stays on display until you shoot again. One string, from 2 to 32 shot memory. Measures high, low and average velocities, extreme spread and standard deviation. Retrieval of individual shot velocities and statistics. Delete individual shots from memory with automatic adjustment of statistics.

# Made of 20 gauge steel.
# Weighs less than 2½ pounds.
# Uses one 9 volt alkaline battery (not included) for approx 48 hours of continuous use.
# Mount onto a tripod or place on a table.
# Has a large LCD-readout, 0.5" high.
# Measures 7½" long, 4½" wide, and 2¾" high when folded.
# Has an adjustable size, triangular shooting area from 8"×8" to 14.5"×14.5". The sides of the triangular shooting areas are made of wire-rods; the top of the triangle is formed by a 2¼" wide x 1/8" thick strip of tough, Hi-density polyethylene plastic.
# The LCD-readout and all the Electronics are located in the housing, out front.
Gives numbered shot velocities.
# Velocity stays on display until you shoot again.
# One String, from 2 to 32 shot memory (Numbered).
# Measures High, Low and Average Velocities, Extreme Spread and Standard Deviations.
# Retrieval of individual shot velocity measurements.
# Delete individual shots from memory (with automatic adjustment of Statistics)
# Stereo Jack for optional Remote Control or Ballistic Chrony Printer.

# Three year limited warranty when returned to manufacturer.
# Upgrades to any model. To upgrade your Chrony, contact the manufacturer.
# Not for use with Neon or other flourescent lighting, as they flicker at twice the AC frequency and cause false readings. For indoors, a light-diffuser and an incandescent light source must be located above each photo-sensor.

In order to convert pellet/bullet velocity as measured by the Chrony into muzzle energy, the following formula is required. Don't worry, it's not at all complicated and it will be accurate; unlike the results normally achieved when using cheap plastic chronographs that attach to the muzzle and don't measure the velocity correctly but do the simple math for you.


The required formula is:


E = m x v2 ÷ 450240




E - This is the muzzle energy of the bullet (in foot-pounds force) i.e. the answer

v - This is the velocity of bullet (in feet per second) this needs to be squared i.e. multiplied by itself within the formula

m - This is the mass of bullet (in grains) This is normally declared on the tin or box that the pellets/bullets were supplied in.


For example, take an Air Rifle pellet that weighs 16 grains which is measured at a velocity of 600 feet per second when fired across the F1 Chrony. The resulting muzzle energy will be:


16 x 600 x 600 ÷ 450240


= 12.79317697 Foot-Pounds Force

Business seller information

JJK Guns Limited
Company registration number: 5804229
VAT number: UK 886294175

Returns policy

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Return policy details
Returns and exchanges We offer a full money back guarantee for the bid/purchase value of the item(s) purchased. You have 30 days from receipt in which to return your order. You will have to pay the return cost of postage or collection. There are no refunds on shipping or insurance charges. We require the buyer to complete ebay’s mutual agreement acknowledging the return of the item(s) prior to issuing a refund. We want you to be entirely satisfied with every purchase made from JJK Guns Limited and are proud of the quality, range and advice that we offer. If you wish to return an item for exchange or you have decided not to keep it (cancel your contract); • Please contact us within 14 working days from the day after the delivery day via Email • Please add full details on a returns note, supplied with goods to the reason why the item(s) were returned • Please return all products to us with its original packaging and labels within 30 days of receipt. • All goods must to be in a new and unused condition together with a copy of your original receipt. • All item(s) must be returned in the same condition they were shipped. • We recommend that all items returned to us to be sent Royal Mail recorded delivery with insurance paid as a minimum. If you feel the goods are faulty please contact us immediately and we will then contact you to resolve the matter, the above conditions also apply.
Most purchases from business sellers are protected by the Consumer Contract Regulations 2013 which give you the right to cancel the purchase within 14 days after the day you receive the item. Find out more about your rights as a buyer - opens in a new window or tab and exceptions - opens in a new window or tab.

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