Yeah, I'm inclined to agree with Melchett01.
My history was:-
First Logable Flight: February 24th 1984 on a Wessex HC2, (XR520), as left seat observer.
Between 22nd January 1985 and April 16th 1985 I was at RAF Odiham on No. 240 Operational Conversion Unit, (OCU), learning the Puma helicopter and totalled some 65 hours on type.
My last flight was on 18th May 1988 in XW211.
My final statistics are 1178:35 hours on Puma helicopters and a total of 1294:15 hours logged total aircrew logged time.
So, on rotary, 1300 hours is achievable in under 5 years...