Hi Jack,
Thank you for your input but I think I have eliminated all but the bedding as the problem. The groups are just too inconsistant except for one thing, they always string more horizonaly than verticaly
one bullet strung out over 2" wide but was only 5/8" high so far the best groups have been with Hornady 100 Grn Spire Points and 87 Grn BTHP followed by the 95 Grn Nosler Ballistic Tip. The Hornady SST had produced a few groups which show promise. So far IMR 4350 has provided the best groups.
For the bedding I have just picked up a pack of Brownalls Glassbed, now I just need to find a source of Modelling Clay, the place I thought I might get it has closed down in the last week or so. Might have to try an alternative.