Berinsfield claimed four wins at the opening dinner show of the campaign before a sell-out crowd at the BMW Club in Cowley.
Switch-hitter John Collins delivered their first win by getting behind the jab to outscore Cheshunt's Pat O'Donnell.
Richard Tyler then claimed a split decision after an intense scrap with Eltham's Jack Dishart.
Michael Lobb - another Berinsfield switch-hitter -had more in the tank to gain the edge over Marlow's Shane Massey.
Roxroy Eccleston imposed two standing counts over Benson rival Tom Wood on his way to a decisive victory.
Simon Welsh battled bravely before missing out on a split verdict to reigning Home Counties ABA featherweight champion Ian Bailey after a solid four-round battle.
Michael Rendell was unlucky not to get the nod over Cheshunt's David Leo after dominating the early stages.
Former Abingdon prospect Harley Mace, having his first outing in a Berinsfield vest, narrowly missed out on a split decision to his taller Eltham rival Henry Sewell.
RESULTS Schoolboy/Junior: H Sewell (Eltham) bt H Mace (Berinsfield) maj pts; J Collins (Berinsfield) bt P O Donnell (Cheshunt) unan pts.
Senior: R Tyler (Berinsfield) bt J Dishart (Eltham) maj pts, S Russell (Marlow) bt MHarding (Blackbird Leys) maj pts, F Rooney (Marlow) bt P Brown (Berinsfield) unan pts, R Eccleston (Berinsfield) bt T Wood (RAF Benson) maj pts, T Byrd (Thames Valley) bt R Grant-Downton (Berinsfield) maj pts, R Highet (Ox Univ) bt D Morris (Berinsfield) maj pts, M Lobb (Berinsfield) bt S Massey (Marlow) maj pts, D Leo (Cheshunt) bt M Rendall (Berinsfield) maj pts, Bailey (Slough) bt S Welsh (Berinsfield) maj pts, M Churcher (Thames Valley) bt I Jenkins (Berinsfield) maj pts, D Holder (Slough) stppd Ce Battista (Ox Univ) 2nd round.
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