The following are the results from an entire box of twenty cartridges factory loaded by Winchester Super X with their 510gn soft point bullet.

The tests were conducted using TWO chronographs placed one in front of the other at 8 feet from the muzzle and 30 feet from the muzzle respectively.

The test was carried out on the 7th October 2000 in England using my own Tropical No.1 which was built in the mid 1980's.

The recordings were as follows:

2006-4581 1981-4467
2037-4724 2016-4627
2040-4738 2018-4636
2071-4883 2045-4761
2010-4599 1989-4504
1994-4526 1974-4436
2042-4747 2019-4641
2042-4747 2019-4641
2035-4714 2012-4608
2044-4756 2019-4641
2022-4654 1998-4544
2032-4700 2008-4590
2010-4599 1983-4476
2021-4650 1999-4549
2039-4733 2012-4608
2002-4563 1977-4449
1986-4490 1963-4387
2024-4664 2001-4558
2002-4563 1983-4476
2006-4581 1981-4467

column one velocity at 8ft in feet/sec
column two calculated energy at 8ft in ft/lbs
column three remaining velocity at 30ft in feet/sec
column four calculated remaining energy at 30ft in ft/lbs

SUMMARY
mean velocity at 8ft 2023 feet/sec
mean calculated energy at 8ft 4661 ft/lbs

mean velocity at 30ft 2000 feet/sec
mean calculated energy at 30ft 4553 ft/lbs

I hope that this may be of use to SOMEONE

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