SLB vs 940
Well, I don't see what the difference in having a forged steel receiver or an alloy or even polymer receiver has to do with it. The bolt with the rotating bolt head and locking lugs locks into the barrel extension. All high grade steel. Browning has sold tons of belted magnum BAR and BLR rifles with alloy receivers and you don't hear anyone complaining about the receiver failing. And the roller locking bolt is a good system but complex and expensive to build. If they were the end all, why do 99% of all military guns have gas piston operated systems or direct gas systems? There are advantages to both obviously, but a piston operated rifle is also tried and true. Ask anyone who owns or has used an M1 Garand or an M-14. And as for accuracy of the semi-auto rifles versus a bolt action I think you are overstating the ability of a bolt gun to outshoot a well built and well handled semi-auto. Old wives tales. The Army certainly seems to think a lot of the new semi-auto sniper rifles they are using. Some of their reasoning was for greater fire power but I doubt they would accept a serious loss of accuracy to gain the added fire power in this type of rifle.
If you have never owned an SLB2000 I would not be so quick to bad mouth someone elses. HK cut no corners on the barrels, bolts, chamber cutting or the pistons. It isn't a roller locking gun but it is a more modern and easily manufactured rifle. Less costly, more modern manufacturing techniques and materials do not equal a cheap, poor quality rifle. I can tell you from personally shooting the SL7 and SLB side by side that the SLB will shoot with or even outshoot the SL7. Less felt recoil generally makes for better and more accurate shooting.