Is it okay to shoot lead bullets out of a P9S in .45 ACP with the polygonal rifling? Is there an official opinion of Heckler & Koch on this matter?
My experience with poly barrels and lead projectiles has always been negative severe leading and fouling with increased pressures (assumed) by the large rise in recoil felt. This was on a Steyr GB 9mm which was quite a robust pistol. Recommend against using lead in semi auto pistols. I stick with factory and NATO type loads, YMMV.Is it okay to shoot lead bullets out of a P9S in .45 ACP with the polygonal rifling? Is there an official opinion of Heckler & Koch on this matter?
This is interesting info. But you are the OP so I'm confused. Did you uncover this info in the last 24 hours or so?I used to shoot lead out of Glocks since long before internet gun forums came into existence. The HK P9S, especially in the Sport version, had been very popular among German top competitors in DSB matches. Since they mostly reloaded and were casting their own boolits, HK officially gave some guidelines. They included general reloading infos and common sense rules, as well as recommendations about bullet weights, alloys, and velocities. In 1991 Gerd Luck had not developed coated swaged bullets for Haendler & Naterman, yet, so coated bullets are not mentioned.
The HK P9S - with lead boolits - won more than one national championship in HK's native Germany. This should debunk some of the internet myths about the inaccuracy and dangerous pressure level generated by lead bullets shot out of a barrel with polygonal rifling.