ok my cousin and I have found an issue

1851 census has 2 x Richard Perkins age 52 born in Warwickshire

The stray one is (according to Family Search)

Richard Perkins Age 52 born about 1799
Old Stratford, Warwick
mother Ann
residence: Aston Rd (Aston Cantlow, Warwick England)

and my Richard w Harriet (copy emailed to me of the census entry)

Richard Perkins age 52, Pistol Maker Place of Birth: Birmingham
Harriet Perkins age 48 w Place of Birth: Market Harborough
Plus children listed

Family Search has

Richard Perkins 2 July 1799 Saint Phillips, Birmingham, Warwick, England parents Richard Perkins and Ann

and the Marriage of Richard Perkins and Ann Horton 21 Feb 1796, Holy Trinity, Stratford On Avon, Warwick, England

We can't find the other Richard's birth and the above Marriage in Warwick is the only one I can find.