Triumph_Dave
Well-Known Member
If anyone on the forum has a Heym SR30 rifle, how do you rate it?. Also what is the difference between the model SR30N and the SR30.
Dave
Dave
Heyms are well built rifles, with an old world hewn from solid feel about. They have a mix of stock styles from a very European hooked grip, head upright Monte Carlo, too a their classic with straight comb and straight forend more akin to the British / American style. But they are hand built and to some extent you can have them built to as you wish. Sr30 is a straight pull, with a solid mechanism. Not my cup of tea, but if you are after a straight pull a lot nicer than the Blazer and probably less money as well.
Heym20, would you happen to know what Heym use as a rate of twist in the .308??
Dave
I can help on this a bit.
I ordered 4 new Heyms (SR40 & SR20N) models direct from Friedrich Wilh Heym in Munnerstadt (through Armstrongs of Nottingham) as they were the only maker making quality Lefthand rifles at the time. No right-hand for me ever. Being a small semi-custom outfit, their catalogue concentrated on the quality of their worksmanship & engraving, but was short of facts. It wasn't informative at all, so I asked the UK dealer for info on the barrel twist rates.
The MD of HEYM was a Mr Bang (true) and the Deputy MD who succeeded him was a Mr Reinoldt. They both seemed surprised that a customer should be asking such questions or be interested in gunmaking. I've still got their letter which says 'it isn't usual to publish these details.'
As all Heym barrels are hammer forged onto a mandril, they had actually got photocopied and forwarded a copy of their "Drehsinn" (mandril) dimensions for all 29 calibres they chambered then, with a technical drawing of the rifling profile they used (sine/tan dimensions) and a table of entries for .22LR through to .470NE.
Quite amazing customer service, but the downside was that all of it was in German.
Anyway the info for my SR20N LH .308 (now sold) shows:-
Steigung (twist-rate) 305mm
I
Zug (groove) 7.82mm (+/- 0.004)
Feld (land) 7.62mm (ditto)
Anzahl der Nutter (rifling) 4-groove (rechts) right.
Quite a trip down memory lane this. If they haven't changed their engineering specs & practices (doubtful) then your .308W is 1 in 12" Imperial - near enough.