u state that the bolt operates ok before u fire the cartrdge ?? have you turned the bolt down to lock the chamber and if so does it still work ok when you unlock the bolt ??
i have one of these and the sear can hang on the bottom of the bolt,if parts have been changed and not installed properly,,also check the fireing pin at the back of the flat are there any knicks or groves the sear may be hanging on ,,it and may need a bit of a smoothing ,,or just hold the trigger back so it holds the sear away from the bolt ,,, a bit of shimming between the sear and body so that it clears the bolt but still catches the fireing pin,, you have to set up the sear and trigger together to allow the sear to engage and still allow travel of the bolt..dont start grinding the sear down or u wont have material for adjustment later to compensate for wear or proper engagement of the fireing mechanism... email me or if am on here just message me
i have one of these and the sear can hang on the bottom of the bolt,if parts have been changed and not installed properly,,also check the fireing pin at the back of the flat are there any knicks or groves the sear may be hanging on ,,it and may need a bit of a smoothing ,,or just hold the trigger back so it holds the sear away from the bolt ,,, a bit of shimming between the sear and body so that it clears the bolt but still catches the fireing pin,, you have to set up the sear and trigger together to allow the sear to engage and still allow travel of the bolt..dont start grinding the sear down or u wont have material for adjustment later to compensate for wear or proper engagement of the fireing mechanism... email me or if am on here just message me